Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af61de31a1690c7…

MALICIOUS

PDF

78.0 KB Created: 2021-07-02 16:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 238c430ae89ddfa24343b8817c1627e1 SHA-1: 2bd2f927c78ed1f8dc52a67f88ae5f0ca638486e SHA-256: 9af61de31a1690c7b6ed53a6b41ff25384cba638877f9af1ba15be6cbadb6ce5
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as lures to download further malicious content or phish user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6284

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://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5bece918---94756764953.pdf In PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606d81cc58b91---zafifupotisesizixa.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a4e4822d0---jupoguxajiwoxomi.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1622795520263554242.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160934e2099bbd---4068099737.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba063bcf1e0---bunuzalotibulowaba.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/33128791566.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/79245767538.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/sawonomiguwujum.pdfIn PDF document text
    • http://kotolantopeni.cz/file/wirotetovobarekob.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/27241650347.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/sogilegipa.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/6j9bgf7bpqqq3vc6cs7hu0j7cr/berezatibixofixurix.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/banojuzezobufumasamu.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/55c7bab4311e94f6dbbe62c30cff28d3/86125403760.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/nugudojajelevolevuma.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/58234880905.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a9708ba9---63307048521.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3957fcb5f0---81810971848.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3150e0ed077479e0898a0bf4e98f25a3/nomuduretuzatizera.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/86921589149.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607435168e6cd---lirubuzaravim.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914b72df335---pajogekovura.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff6ea98e46---duzatasidara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dnd+animate+objectPDF link annotation

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