Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba15df4bc17694d…

MALICIOUS

PDF

96.9 KB Created: 2021-07-20 17:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3d30a403f5e8f7ef50c3a3ff94797f4e SHA-1: 081f7560d8eac2e7194fe7127b6014e13c328e21 SHA-256: 7ba15df4bc17694dc152b1ae64e7264eb87d0a0920235cb42e823d6354892d5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating it is designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple links to WordPress uploads and form plugins on various domains points to a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/hmtfha3rasj3espku88o5ovnf0/84286570314.pdf In PDF document text
    • https://chp-travel.ir/data/file/bogodewesu.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/80992025679.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dc92b0533---kupusi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/sofatal.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4f7ab7539---mowixesufivovi.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd53997f7---watofonajepis.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/db0ddgrim1eeh0hpil64af5997/1304750396.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f274209022---98774287673.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/xupexoteromonak.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/kededokigamovubebuzafimoj.pdfIn PDF document text
    • https://foulardfotografando.it/file/voziwo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/0cc82c2f49fcbeab27f5adaa9341d2a5/badomixalunemig.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2d8eee999f5f9eee586c225d12505a59/47397878366.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/537289add6a1a7af1a756bd9402af725/wamuduripazekawasoj.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607410f96155c---bonadogadulawaxufixisimuf.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/gilometibi.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/difezisimedoboserugizi.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/sozefagi.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeda35a8a2f---senimeweretinibo.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/65799327565.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/mutelevenizenudo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d66a83a5e5697c6fb91ec90f159d94d3/57200961434.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5c60d97c---19912417788.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/86066868784.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/78108054650.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=baxter+repeater+pump+technical+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001164e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164E 18196 bytes
SHA-256: 0650c27e9fa1cf91ff398ad4cd1203d6aebaaa7d82b9d2dcb953c2965ad33b5a
font_01_sfnt_off000145c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDA 10608 bytes
SHA-256: 3646e39fd4511d063a86bb9ba99df84a0d74261163497c502b841c10a219b1d1