Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b01c2f683664d3…

MALICIOUS

PDF

76.0 KB Created: 2021-05-01 10:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 002a6638c6b6e00ab284ebec6a066dae SHA-1: 5b8cf458d309376261d57fe85544b488581ed456 SHA-256: 13b01c2f683664d3d9b6aa30077d8a804a78e99af92785048b49f214b0d80144
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://xezojetit.ru/strik?utm_term=sopa+de+letras+para+imprimir+para+ni%25C3%25B1os+de+preescolar PDF link annotation
    • http://fukatamuvubigo.iblogger.org/3857158704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_605957f0a6018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_604dafcc9bf70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb69dfa6fe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491936/normal_60015045ac000.pdfIn PDF document text
    • http://raxebazidalorow.22web.org/74515070126.pdfIn PDF document text
    • http://viriruxik.22web.org/reformas_borbonicas_en_puerto_rico.pdfIn PDF document text
    • http://winopufivugum.22web.org/construo_de_tanques_para_piscicultura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5ff671739a880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_6051c60a36468.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/69476921709.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_5cc0e78ea9cf4923b0cba89f78b9948e.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_0c4016e410cf4978a282f7ed1de64be1.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_85712450354c46f9b4942eb8969a11a4.pdf?index=trueIn PDF document text
    • http://pibuluxe.rf.gd/87073567228.pdfIn PDF document text
    • http://kenamumiv.rf.gd/incident_response_playbook_template.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_f97adc9cca4d48bda4babd35c4831364.pdf?index=trueIn PDF document text
    • http://godanalig.epizy.com/96793504943.pdfIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_32fd7166d998443d92f353b72643691d.pdf?index=trueIn PDF document text
    • http://kimitumepogamom.epizy.com/solvents_used_in_non_aqueous_titration.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5532 bytes
SHA-256: 16aac6668cbab5d4d76210d084c8e60b434cb3da70f6632cf440b7b066f8c67f
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 12168 bytes
SHA-256: abeb3d3b721fe880352f40ed209bc895dd7268b99eb9004c6c2a95355a03ec7f

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