Malicious PDF — malware analysis report

Static analysis result for SHA-256 6266ae89d8bd1aed…

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 02:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e931b9cb3bd83a4f31ed18588bc8991 SHA-1: 4bb250462c43239549eaf47f284dae4664023aa2 SHA-256: 6266ae89d8bd1aed0f637bb4dd67958720cba1d2ef5502883d3267bcaa1d6141
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bscartridge.com/pic/29166833471.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b6c2f4e6ae13ffcddfb15c1e6113c99f/kavatibubokok.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/nevetabufuna.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e5a6b15b2dca282b04f84a4a524e20a5/sewobuvenalogime.pdf
    • http://dorrstrechy.cz/UserFiles/File/zetejo.pdf
    • http://esipro.fr/userfiles/file/34186086876.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608601d6a148d---jenotobefedubegi.pdf
    • http://www.asslar.de/downloads/lexob.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081263964d0f---kirepamezozakigezofokab.pdf
    • http://tulsamemorialclassof71.com/clients/84987/File/gixudipujilipepisizapuf.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/nedanirurip.pdf
    • http://adance0112.com/upfile/editor/file/74281025614.pdf
    • http://botosani.ro/img/uploads/file/63682105345.pdf
    • https://numen-wow.com/userfiles/cloud//files/27835302332.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/cf784cf69eeb654128b6835453ce2859/dixafowaxo.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/3mjctcbvnioe8u7n0hb9a9bpln/panuwubebap.pdf
    • http://akkoryazilim.com/userfiles/file/jajagi.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/5a1f8d326b1d7e763f7f180a0bb057d3/zixijusodifufaki.pdf
    • https://shibbirs.com/media/files/99257061552.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b37e9ce75---5949124646.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/32ca5073f904f8356fdbe8edaff21977/xelorobixofamaxavonemabag.pdf
    • https://nikosdimos.gr/userfiles/file/lenirexiges.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759013ed25b---13340443513.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/51b24757fedb0e931f6756d3dc79c936/87769152363.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7436ead83885548002551cc45cf25a13/85764551759.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=contract+champions+of+azeroth
    • 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_off0000f083.bin
7ce9fb6adad62656f0199ba15d54d2eb13f24f774cc4964f9dcba969b781e1cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 17004 bytes
font_01_sfnt_off00011c9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 16792 bytes
font_02_sfnt_off000134b1.bin
d6081070016385465203ab16273d5381dd717748df575590be3ea7d3b78bffa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x134B1 10788 bytes