Malicious PDF — malware analysis report

Static analysis result for SHA-256 17360f24c7a82e28…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 22:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e1a23be6d65c9a3120a3f88559b04297 SHA-1: 46e743dcbf9709024b39dc753af425b7f41a585b SHA-256: 17360f24c7a82e285b13d9d333079e962329824bf62b22db9f9fed70117cc130
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the heuristics point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/aws?utm_term=examples+of+biological+hazards+food+safety PDF link annotation
    • https://kajanivok.weebly.com/uploads/1/3/2/8/132814977/4396831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_602637e395148.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/17814175160.pdfIn PDF document text
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/buxebidam-rigimugibuwune-filovemun-bapuwemavobabis.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/jffL1hh/39753051452.pdfIn PDF document text
    • https://tafanavudijis.weebly.com/uploads/1/3/5/2/135299899/natomuxobod.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/xekoze.pdfIn PDF document text
    • https://jizesemud.weebly.com/uploads/1/3/2/7/132710762/tofuzijezozisubojo.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/3458358192.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/8508506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_6029cb04561fe.pdfIn PDF document text
    • https://cdn.sqhk.co/nubalevuvem/jijib8I/idle_island_mod_apk.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/90023295040.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/icrhhO3/rupegapikarunevovijefa.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/9945203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bakoloj/dinafexaraneme.pdfIn 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_off000100a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 5884 bytes
SHA-256: d6c72541788514d2f8a925ee4e6919ebffda7c22bae09bba4069c376724fcd65

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