Malicious PDF — malware analysis report

Static analysis result for SHA-256 7470dc9e530cfae3…

MALICIOUS

PDF

57.7 KB Created: 2021-05-11 13:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32a44211aab5efeec90028092619268 SHA-1: 7eea5352b64f4d9bc1370775e2504494386f565f SHA-256: 7470dc9e530cfae34e6f184d866b59436566a22f6611ef3ad101421255bc3b68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

Heuristics 5

  • 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
  • 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://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/e236675287217293c8034992c631ce7f/56154987997.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/31c6d2d3143574d8420dfd43322a0439/sumuvogifonopevazol.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c87b66bf6612afd9464f43c82d3b96ca/sisudozavilama.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097b97671d05---ginagerasemitig.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/24630c072e5179c1b343ee5199f2dc13/86611368532.pdf
    • https://allcreaturesinc.com/files/files/jogusiresibuzesorusumuges.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/479d165011cb05eddd31fe550e77fc36/48996239317.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607710c0e20dd---kuzaniwep.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081a5f816445---42382996096.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4f59dd922---79702610255.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a5c8e91f---72594977701.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28b4c4f7a---zumifefinakerusepuvopodi.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/aa81ba682ae59b9912a8a7da110c0102/16219262761.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070db1d027d7---13458568980.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/80193f7f13be9ebff08f705856e84985/78680452794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ielts+examiner+interview+questions+and+answers
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca79.bin
3b2d7455c4ad91cca2bd4fc3eb6b68a2b2491d979043fd022e3b0efc0637488c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 5256 bytes

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