Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a1b84020b8a481…

MALICIOUS

PDF

71.3 KB Created: 2020-12-16 21:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee09dc107bfd95e34cd998d944fed29a SHA-1: 10808d8761e80f2219ed2d896c011f7ab8f03a68 SHA-256: f4a1b84020b8a4817aadad0a05ca0e9cc0ff1420790b0e73312a02d8fa48f282
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=exploring+american+histories+volume+1+pdf+free PDF link annotation
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/xekunikinazitug_zibike_mekozevovusikof_pinibap.pdfIn PDF document text
    • https://vazujupipizake.weebly.com/uploads/1/3/4/7/134719511/sidejuganirob-delovajaz.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/196dceb.pdfIn PDF document text
    • https://joxuripuziw.weebly.com/uploads/1/3/4/2/134266010/jebavobopaxizezidaju.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/gosarajivem-kozazijixake.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/8005319.pdfIn PDF document text
    • https://bilafewutugu.weebly.com/uploads/1/3/4/6/134619215/sepekeban.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
    • https://uploads.strikinglycdn.com/files/dbe21097-9642-4d50-a84b-453e3024302b/nct_127_mp3_matikiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3b326b-4610-46cf-8520-21586b8906da/87615366809.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/mahjong_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kototelarotowewuzeluxit.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/logiciel_gratuit_pour_fusionner_2.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/49580862423.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfdcc2dd96f5918b47b0a/1606286796811/vafotabimori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff1ba42-cc95-41ae-83db-6063026d8c74/zaxavunenipijowulig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 5588 bytes
SHA-256: 68c74b7a364696332985a18ebe878a792d5cede6ce654ab7e32f4aeba43ddf9b
font_01_sfnt_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 10968 bytes
SHA-256: 888c88595a6c532d4bd1f08541157c598ca079b94318d075df8bc9f07f0be91c
font_02_sfnt_off00010235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10235 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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