Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6d5125bbf1740a…

MALICIOUS

PDF

110.0 KB Created: 2021-06-28 20:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 62efce74f4ba59fc543842275b5e5659 SHA-1: e54e33dcf66c453ac8f91bbc2f9d475c6e36bb23 SHA-256: da6d5125bbf1740a14c4ac0f56e60ce379146b0af3799312c7fd6d417796e960
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It contains numerous links to external PDF files hosted on compromised or disposable domains, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The ML classifier also flagged this PDF with high confidence, supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/7db213027a87687fdf6ea300c8313eaa/zuwojozixaminonira.pdf In PDF document text
    • https://serviceservice.eu/userfiles/file/riderimemevuwegezameboda.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609472ea82cb9---dideduraguzonunobaredorek.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/cf01c73938708fcaec537a7dc51014cf/83351963080.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/q15vj6krberj76t3h82lceo1k0/7684608547.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215252332457161.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/81416450899.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/96296310513.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/63896095359.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16091371ddc560---tunavujosigurafixexutej.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e826849bb8---4243044148.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/riviwuxogojovavabir.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608053597b68a---bujefuxomekuxe.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adad2965c1---sizazu.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/3qiohc6h1de7irm0n1m5gv081f/16213020636.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/laxitukazapifine.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/djfls5t8c7n36ahrudmv1mtpnb/46159820437.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c72d97787---61565172492.pdfIn PDF document text
    • http://iphysiology.ru/upload/nokojinuza.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/uej7vrpek9msvq98rvogdanjj7/25689213452.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e6146bdf0---tulivebaronus.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706e5f92f08---1048532792.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/cf2f1cb0f5c2e442845eda60670add7c/37163951056.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4a4696679---tevizuposuzumenutab.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/garisigogupezar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nck+past+papers+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D8 16224 bytes
SHA-256: da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7
font_01_sfnt_off0001477d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F94 10320 bytes
SHA-256: 17ad6521534e245381343d05c18b2f08e1afc3343b0aef208e72c61efa720e72
font_03_sfnt_off0001770d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1770D 19084 bytes
SHA-256: 23e56447e0270dd2bfad30da144e76ebf65b2639c3eea6a24fce342e22479111

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