Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefb74d87c5571fa…

MALICIOUS

PDF

76.8 KB Created: 2021-06-03 00:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 89513bd99204e2aefd752f0d8f09a971 SHA-1: b65f497379675c9997893dfa5c2b464206263dd4 SHA-256: fefb74d87c5571fa030ff8dd34392851e4228823084bc43f4c05f2c576adc0f5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://jumiwimov.ru/123?utm_term=burgen+soy+lin+bread+nutritional+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388048/normal_603815c217e95.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/5034872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_605a9a430f2ba.pdfIn PDF document text
    • https://dujedagopodiku.weebly.com/uploads/1/3/4/5/134580966/denuli.pdfIn PDF document text
    • https://wisukemebo.weebly.com/uploads/1/3/5/9/135962546/xepem-runov-kifiz-xafararugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_606a2837eb5a4.pdfIn PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/wikox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijakezepo.pbworks.com/f/bevoz.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144450459/83904268708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b4a402-3150-429e-9f6d-2ad14fee9d31/manual_cateye_velo_8_portugues.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/w/file/fetch/144419169/kenixujoj.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/11098649133.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/zotovisazamifawumux.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/gabezivuvofefudizer.pdfIn PDF document text
    • http://tiduxikuve.pbworks.com/f/kurosi.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144416838/zudarilotunaketa.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/55962770416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c8dfe8-e9e1-4e50-a696-2785df0c0a4b/81503286069.pdfIn PDF document text
    • http://zegugas.pbworks.com/f/what_type_of_oil_does_a_toro_lawn_mower_take.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/wella_liquid_hair_toner_directions.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 5520 bytes
SHA-256: de9670970d7e6ce99f99eefd7f88422875bd85fe3dd9a1d3cc8b3f7c9d03e423
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 11440 bytes
SHA-256: bbaf19a9e89750bbd13cca70195a3f48393cc1f3a31c2b76d8a6df6827d12a9e

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