Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adfdf955d49725f…

MALICIOUS

PDF

57.5 KB Created: 2021-06-13 09:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b69bb0f5e9a3eb4e2d3f2216d95c0c5 SHA-1: 800bb6edcafa2777fc5debf01bd5e8dada37ce11 SHA-256: 5adfdf955d49725f1b36b58862a6a4ccaec0e0b9c284c0aa62c6b7c76179c29a
154 Risk Score

Malware Insights

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

The PDF document contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. The presence of multiple compromised CMS upload links further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=cowbellpedia+past+questions PDF link annotation
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f7507b89cc133996ee3b3b443c2faaa2/fovujajikifusuwuxijus.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/5453fa79c4c32ead29ee1f929c036d77/gojavida.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9395f26e3---74812948000.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c34f85669dc---zerunapize.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/o4fpd8qfvvjnifvs0qp4fgt69h/17700895287.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/7510866589.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/43d629fd3f6ed5160b357f394e7a6882/28145666925.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dvh42b39jv6t2vml2aq165k291/kuvutalexejof.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc8daa9effec23f7bf74fe282a547793/fokuvurelo.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cecd594106fb466faaee5b276e0afd91/rabilada.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/b51582bfe68bfadbd800c99e494ccf52/64066178944.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ef3b84b9228139cc36469c9195863128/66597355575.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/8181029446.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/7eb9ca6f2e706592c9431f52b9a56300/77998848124.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/vibizipedajuxevutiv.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad050560a07---37559853858.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b70088d5c68---56557382146.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/9129117159.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 5120 bytes
SHA-256: d16b600b4f91e26484845e3e9ac9d42581eb700ba332e1e5dd2f4a51ca555e22

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