Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee222ae95a4e6da…

MALICIOUS

PDF

80.5 KB Created: 2021-06-15 12:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ef05e5401b6fd9c134041c2def4a268e SHA-1: 802c6ca182f653b6c70dc1bef89d24837c09ba3e SHA-256: fee222ae95a4e6da77e34d91e258649b3a56996287d27df27df2c20bb36d8be1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'Android auto aa mirror apk', indicating a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=android+auto+aa+mirror+apk PDF link annotation
    • http://okfilm.kr/userData/board/file/sefuw.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/1ceb04ff517314889b593d0b225d9697/73808968912.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/e791de66ecd8e47ad958762ee306da07/73070279790.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/dozigebufumeravewozami.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45255931a8---31670798769.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/zoluminemit.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ckpm0g0fpgelreljp8s1c33bu4/vodulasasunedawugojisi.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/prmjts8mfva0fjnadf24d38nt3/40635549788.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b548b08858f---67635505454.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/e1e4db11339997bd64daa2f007c23edc/90988547717.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/9s2rfprv95of963aae0o4qglf7/47900158773.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f933b2c947be11b49b7709ff13f141be/79431275643.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/vubewupevo.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607070a23ec0c---gasomarilofisekusiva.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/92dac2a6cc2268f7b168f7571df41543/74918540362.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f83973ea5d---27251863811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 4948 bytes
SHA-256: f62447fdf6132b5adfd80ea28b0761c835c56e6b1bca6c2d752f0fad8c24acff
font_01_sfnt_off00010d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4E 11196 bytes
SHA-256: 40a54c73a84e15f4d169f4535a5ee6132d3e9474f3a091d6414cb9264457f0c0