Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16a3de8b336e019…

MALICIOUS

PDF

47.6 KB Created: 2021-05-25 15:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c17e4afb040b8a6eeec5e7c0fc24b74f SHA-1: d25d49bd173c9e1cd85f8bbe74ac672152032d28 SHA-256: e16a3de8b336e0190520643d1eb7c8a94d85b2877615b96c3ef7eda1107c0269
174 Risk Score

Malware Insights

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

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-based interface designed to trick users into clicking links hosted on compromised websites, likely leading to further exploitation or malware download. The document body is heavily obfuscated and contains no actionable text, reinforcing the visual lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7205

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 47 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://abofahed.com/userfiles/file/kevunurazize.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609617201fb5a---97070240547.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0acaea642f---54173793514.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb05ceebb3---wikez.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d8ca85ada2e6d881b05b231e81a134da/gonebofigikaravelul.pdf
    • http://huntland.hu/upload/file/tijakixonovomazajelex.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/3749b16118a9e4486bce5a14d5165528/4606352221.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/niwev.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/80f921425a1f9584253f8e0f7188c46b/jadawobujegar.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/92775175750.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/baa362028255bc6891cd92a679b8e521/taxelagakapoguwas.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/8d15bd97eff4d519a057de6dae83eab5/6986771020.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/615d6bcaa8ace7c4d77a7a3d6bb3244e/vagezakuzoxodobodoxep.pdf
    • https://lawina-radom.pl/files/file/54724998791.pdf
    • http://mwflower.com/upimagesfile/%5C/58638633841.pdf
    • http://xedaptap.net/userfiles/file/tidatamaz.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795c9841a28---gekixopubufovolafukeluj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=basic+geometry+terms+worksheet+pdf

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