Malicious PDF — malware analysis report

Static analysis result for SHA-256 82af3698287d2770…

MALICIOUS

PDF

38.9 KB Created: 2021-09-24 20:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3fc9ce2e4efca511e45104cf3ef08bf1 SHA-1: 9cb919c679353d51c44ed982a4a0920f2fb04ac7 SHA-256: 82af3698287d2770307fb9092419587f9a0e67d99c78ddc54b78340b5c3c5bce
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or trojan delivery mechanism. The PDF_IMAGE_LURE heuristic suggests it presents a screenshot to hide clickable links, a common tactic for phishing. The numerous embedded URLs point to compromised CMS upload directories, likely serving as a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 38 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://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/lv4hh0vaskqi1v1c3tg4ju445j/62358186867.pdf In PDF document text
    • http://dorp.pl/userfiles/files/foxagenigawakutitoze.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/narejenobarugadezozutawuv.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/36626855005.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/52883252292.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/vujevanige.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/66712583117.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/c0fe37331a2bf3ddfd084154357d2ba3/zimuzasavomovapo.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/63322903301.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d97eb7d3989c213b539533100793331d/dutunebovidizovosowes.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/gigebula.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/5249844509.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140965092667---zubugidezitabozobasesejig.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/nefobibimadubatapotuga.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131710b6d666---98581643600.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/1745168863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gta+5+money+glitch+pc+2020PDF link annotation

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