Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e9e5962d8d6cbc…

MALICIOUS

PDF

73.8 KB Created: 2021-04-05 09:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef1c94ee14ee0d65e04c65680035d929 SHA-1: 8210973019d2cc93d41e7e8b2ca2a7fa55a8f666 SHA-256: b4e9e5962d8d6cbc86519263bee1de355cedd05aceeb14cd58ac9c396118d5eb
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 0.9991

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://crophysi.ru/wix?keyword=lego+maersk+train+instructions PDF link annotation
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/gizuvu.pdfIn PDF document text
    • http://good-production16.site/zkaccess3.5_security_system_user_manual34uvp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5fd2acd2ca627.pdfIn PDF document text
    • https://nimapefakapag.weebly.com/uploads/1/3/5/3/135324130/fufejane_nowelobubuf_milusipimo_wodogofes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff783e227633.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/idgSjiH/91089938304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fca39eb33f20.pdfIn PDF document text
    • http://thestablestl.com/jefokajavapefunodibirorak5buk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_6015efbfca613.pdfIn PDF document text
    • http://esagafow.fun/luseligigovpx1c.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/ft8jihx/waxes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_605253b213e61.pdfIn PDF document text
    • http://datingsexchat.site/soxinexoserea50l.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/a3576861.pdfIn PDF document text
    • https://siganagimub.weebly.com/uploads/1/3/2/6/132683357/wedizedamakaruvovade.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/Whdhjgg/54785494946.pdfIn PDF document text
    • https://cdn.sqhk.co/vowogada/jVNgghg/95397763055.pdfIn PDF document text
    • https://zasaxagojipazu.weebly.com/uploads/1/3/4/3/134381031/wifebidunimadibobosa.pdfIn PDF document text
    • http://simcars.ru/3145362875813gdu.pdfIn PDF document text
    • http://3bki.ru/gaxugum6hsek.pdfIn PDF document text
    • http://2020coupons.info/nomusudirefunufvdm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ea7185-e8bf-483e-a182-e8d692bfd6d6/c_pass_reference_pointer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a31c150-fde3-4956-aed3-e7fa025af38b/self_editing_tips_for_fiction_writers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592137e8-a177-4621-8b22-12d75dbfd3c9/ravofulufimamup.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 5092 bytes
SHA-256: 93054a8605dbb19f36c538aa2a519f3e224dfe62859956f867ac73ea17989838
font_01_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 10652 bytes
SHA-256: 01a0f06d616360bcb8a54c89ceeefee21307ccd7fd986493a1940a16becb3613

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