Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abc2f3ce3d77854…

MALICIOUS

PDF

86.3 KB Created: 2021-02-28 20:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a09b55c82ac19ee7f765088fbefbc7d SHA-1: d36b24bfd20b35bb7e461871d01fc0de3941bf1e SHA-256: 0abc2f3ce3d77854a56c429ca97b301d682a274c280e99433830734a62b12b48
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=imagebox+mf+manual In PDF document text
    • https://cdn.sqhk.co/nomitusibop/aIJ5NR8/car_driving_school_simulator_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/jju6hdQ/royal_icing_cake_decorating_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5fcb02192156f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5ffd446c1fd7f.pdfIn PDF document text
    • http://vknart.xyz/velezup3n1p.pdfIn PDF document text
    • http://feedbacrnz.space/unity_3d_android_game_developmentm3pkk.pdfIn PDF document text
    • http://kayikciakademi.com/tutuapp_apk_ios_11._4._1xya7x.pdfIn PDF document text
    • http://premiumpornclips.com/tazisibetedaberufaduvadirlnb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/w8WhbI2/ms_pacman_unblocked_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/cgiPher/aafes_optical_fort_hood.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425759/normal_5fff56feee074.pdfIn PDF document text
    • http://idealica-official-it.website/neriveqapox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd646b99c43d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://legizoro.epizy.com/microbiology_dave_wessner.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 4712 bytes
SHA-256: 0b64d1a855c3bb433a1a30e425e914746ee840fb992cb1a1c9aa091b449da39a
font_01_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 10916 bytes
SHA-256: d9c0a6aac038eb71a18fa99b122f10011193e64df1d49b9646c68568582e19e4
font_02_sfnt_off00013cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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