Malicious PDF — malware analysis report

Static analysis result for SHA-256 67094f11bfdef857…

MALICIOUS

PDF

90.7 KB Created: 2021-07-29 19:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aa9fb21055638f5b4e3547d670f23ef3 SHA-1: 92f0c444fde68dbca1fdc38a95f2ba52f3df8869 SHA-256: 67094f11bfdef857c318793cd92cc33920da8b5c2be0c58acc50c7133440e9f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. The embedded URLs likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=whirlpool+quiet+partner+ii+dishwasher+manual PDF link annotation
    • http://obchodsezlatem.cz/upload/files/sakisatarud.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/83560083161.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/jadonubef.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/61800466538.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071a5334c30f---gubadeluzixaw.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/61406336157.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e486e5305f61832c21b6f7174cea959c/lamixojanedemesolamakuk.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6bca16c4---jipisofo.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bf49c2bc4---49711938716.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/46679821841.pdfIn PDF document text
    • http://markone-tools.com/upload/files/javonategixafogig.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096005bdee36---88588528260.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8b0d5dba7---79437749042.pdfIn PDF document text
    • http://snsi.jp/image/news_file/74559768050.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160929b0c8982a---numedukarazozak.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/45c56d0fd09fa14063589fb8f88d0a47/fanim.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/kezolofevumamifujomopi.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/wetik.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/414c611cdf6f14690a5e1b23b60f454c/32838225161.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/lutapikovuraximob.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4420a3a1b66a78e6f3bc47b5e0d98cf8/wajufifegekepifibomexunos.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/552867b31ea822f456510156b8a78a58/sisumozugetelaravam.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/voponimirovorovedixemuwe.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/64849f2f07373515c903c34c8dfda641/95448056404.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 20216 bytes
SHA-256: 0538e0501b2c424117fcc5f627008e44116230dae7786e5b7e1a01a3023a6f4b
font_02_sfnt_off0001428d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1428D 10980 bytes
SHA-256: dd5a16ca093f6e441cbb9c4f6a281dd55b19240a9f989319c936b14d08afb8ce