Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b78efb2cbb01a4…

MALICIOUS

PDF

83.6 KB Created: 2021-06-28 08:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6eadfc94d48883e6380c570a1051117a SHA-1: 034e4d49a772d3c925d198609d383f003d7843ae SHA-256: a0b78efb2cbb01a4701434b49d6bfdb6c64c73355caa0eff23e8cc57a8e87091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddacd42478---pulaxunosurevugabur.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/843f53105757b12f6dac41887321a44a/27598001717.pdf
    • https://synersys.fr/contenu/file/botopejinugawaxagopowatu.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/0aee741f41c1b2ac25908958ec2705a6/fofisepatorisugufesumove.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074778aa8e4e---regalux.pdf
    • http://skncn.com/u/files/nuzagijotaralilejefe.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/786a0a4f284647ca9b9d291c905fcede/ramawisezofasireze.pdf
    • https://shiokerbau1.com/contents//files/wozawofudosadoj.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d277a10edc---worabumat.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/335696d75735735163fe56304ee1ddcf/52961118866.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdc9fa5e8d---xudum.pdf
    • https://astek-telem.fr/userfiles/file/pokezevom.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8971a4259---dagudowufijumumotox.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/358aea5e419ab288ba404ed182f81a93/lagetunusazexu.pdf
    • http://accessprecision.com/userfiles/file/27371773124.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/d09n6ltpamuvesslth8ou3gu34/50140823257.pdf
    • https://micsys.in/userfiles/file/32335121854.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882c30ab212---41881972080.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/zemejikimisirovezape.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1586e060a3---tiwezitixazuxax.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57558c6d4---fasepiroresewemeji.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb5aa49d6---mazog.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c554fdd419---soxugepemuxexaz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bsc+1st+year+chemistry+notes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e286.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 16792 bytes
font_01_sfnt_off0000fa98.bin
c0bec7ff80c4a5f1fc00743548cb8faa3a3f81cb92cdb9bf25e189f3d73b3b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 17564 bytes
font_02_sfnt_off000128a9.bin
53f7d5b51e1f93e2ff7ec592210b91e6f3f71dd62da0ccb6b3134aa8853ede0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 10668 bytes

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