Malicious PDF — malware analysis report

Static analysis result for SHA-256 def4057acde15752…

MALICIOUS

PDF

44.2 KB Created: 2021-07-31 00:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6c2de9ae3d272d3a4d74f64a1955aa4d SHA-1: 906b45f0916396d76f5e8c3cc84348e9fa1766d2 SHA-256: def4057acde15752fe933fbffc061b72c561c35b036e393fa096e9637d8020ba
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its structure, containing an image that likely conceals a clickable link. Multiple heuristics indicate it's a link farm hosted on potentially disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate malicious redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9233

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 44 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 http://haiphongcontest.com/images/files/digosabe.pdf In PDF document text
    • https://ajitcoatings.com/uploads/lupurimulisafofaf.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/96408757408.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/55846886842.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/730339c6bfd0b832613387fb951f865c/jeliluwolakub.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/dfb3f5d81d7a440576f5cda1c30cc1f7/wodigabekoki.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/658655347.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b62ed52eceb---78805482822.pdfIn PDF document text
    • https://kopari.hu/files/file/gefipalegutelefoto.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/revagoforarupetomurajufos.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ad90105c54507d977a5dad931defe114/9929187718.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gdirb2q74krsbg11f5k59r2ka0/xifaji.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/madokufel.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/powudavomi.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210612063353_g06wkk.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/kipuwitejiduf.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/b17b321237eeb2ca907425f5575e1760/rizujuwekodaxufazebuj.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/82490214607.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/davemanipugeliripasugom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=church+growth+books+pdfPDF link annotation

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