Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ef95d8262f67fb…

MALICIOUS

PDF

70.7 KB Created: 2021-03-20 17:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0c1ee603050b305fe3c17d80c79bbda SHA-1: 71a3ad4926fa0951dcb5289f8057a2d68d8356dd SHA-256: 56ef95d8262f67fb589e64207e54eac9ba9c0b0fa4c08146500507b149b84e4a
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=vocab+workshop+level+d+unit+13+answers PDF link annotation
    • https://cdn.sqhk.co/gezubesekar/jXrjjhb/67762970082.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/idhjiiH/83510278359.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/fPXoss8/asgard_valhalla_self_catering.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/jeiglgf/15064660513.pdfIn PDF document text
    • http://sbrf.link/xutelovijal5tcj.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/gclijyX/14542320258.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/7dhahii/zombie_the_dead_are_among_us.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/aoHhgij/minecraft_clicker_test.pdfIn PDF document text
    • http://siteznakomstv69.space/which_shark_lift_away_vacuum_is_bestyowr5.pdfIn PDF document text
    • http://omoikiri.info/lulijibatm9uui.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/u0Ugfgj/ruxazatipuluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuvojili/bvhhhfm/patiwubakavofiwato.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/66024165636.pdfIn PDF document text
    • http://mixed-rootwork.com/tigokiliroribojixcz14.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/fthfFlM/betenuvodefa.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/49473310528.pdfIn PDF document text
    • http://selectgetc.top/physics_principles_and_problems_chapter_14_study_guide_answersyugk8.pdfIn PDF document text
    • http://bewudewumit.sportsontheweb.net/xowosozosorafosirona.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/ejie2gj/pugetimukuveroxube.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/c4ff24fc-c2bd-4606-8974-2c79bb32217c/how_to_choose_a_wetsuit_for_diving.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba0e97b-4e24-4632-9a84-55da21e696f4/47173951219.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_off0000d7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CB 5700 bytes
SHA-256: eb48e49348c977c2450d6e556a5f0e2c507fc28f6305a862468d038c8b8b5e44
font_01_sfnt_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 9964 bytes
SHA-256: 8d2d3caf63775e0d51e4a74a7fd063a47c400b1dd6ad7f3c57fe3d635c3a0350

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