Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b27e97c9f47da6…

MALICIOUS

PDF

416.4 KB Created: 2021-06-28 07:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0979b6112b0f787289138ce7968d98ba SHA-1: c06d072b91bb340f7c7f3f5b1326eaed3f95351a SHA-256: 26b27e97c9f47da6b50622193f26be793415ee83a6de6795bd5aa54072f188ab
154 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple links pointing to compromised WordPress upload directories suggests a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, but the heuristics indicate it likely contains urgency or callback lures, common in phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8722

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/vm3vr6ap279votogdvpbndflfh/922002417.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160934e5a09260---bepafeno.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/92381800060.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16095e6f773040---91058154711.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609926d5057a3---xogezuxawezovafazezovise.pdf
    • https://acrgroup.nl/userfiles/file/wovixevujodebotodisa.pdf
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/vogexumanogivutafevezo.pdf
    • https://weyergans-hcc.lv/userfiles/file/17744635662.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ja0rbqjmc2r08k85nbbsfj5ro2/juralumomolesajegowe.pdf
    • http://podlahyadvere.sk/editor_uploads/system/files/vametulerewusikunonud.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606dea657667d---77951344668.pdf
    • https://bestofbucerias.com/upload/file/38605050001.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1aced0bfe---29664371304.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/30850234699.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bb0f00124---49842580792.pdf
    • https://bostoncake888.com/UserFiles/files/nomokojulagutezugoxejubu.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/r9b6i17fg2dipbd8ithbrsehl1/josupedexetowefofixir.pdf
    • http://harchovyk.com/userfiles/file/xesivotenarew.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b955126dd---78326161648.pdf
    • http://ekotop.eu/userfiles/file/kadisuvi.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160898f17a5cc4---wupokuvaxoset.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=jurisdiction+of+criminal+courts+in+inquiries+and+trials
    • 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_off0006117d.bin
e5d515aba61c93b7dc6cc37454e2e155754897f808beb73ece32ad71f1943a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6117D 17092 bytes
font_01_sfnt_off00063e74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E74 16792 bytes
font_02_sfnt_off0006568b.bin
4dd99bc927e61bca18a1988e91d73bfc0b3fab07ca320976e1da6a900ef8dfc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6568B 10876 bytes