Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b118308f108c38…

MALICIOUS

PDF

80.8 KB Created: 2021-04-23 17:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 927d4bf89bad52627970f3ff9d9c56dc SHA-1: 5a40259d6fef72cecd52427f0cafea2b449dacda SHA-256: 29b118308f108c384523dea0ec99bd325a7a5e6976ea35b2dff400657c7cf8f3
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://seumenha.ru/strik?utm_term=how+to+operate+innova+3100j PDF link annotation
    • https://cdn.sqhk.co/nogorodizet/aJjfij8/37655674144.pdfIn PDF document text
    • https://mifajuga.weebly.com/uploads/1/3/4/7/134732675/fibedamukum.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/P1hgQhc/ringtone_sms_iphone_11_pro_max.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/dicSD7y/mini_guns_omega_wars_mod_apk.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/nugosu.pdfIn PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/legolo.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/80e4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/oil_change_ariens_deluxe_28_sho.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/korean_grammar_book_for_beginners.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_ae0e1c9711d94b6e91bc888eec1022d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/jumurewapimimakobuvox.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_60bf0600b95a46a0ac0b3c0c510e3a9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/galaxy_s10_video_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e891205-8c7f-43ef-ae9b-fbeff9c3b57b/do_roombas_have_lithium_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/how_to_draw_your_own_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/mobomemarezakuvivuvedo.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/english_test_for_grade_5_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43efa3e4-334e-4406-8673-0fea2bc19ff6/riguzukojepamugejonugidom.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_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 5148 bytes
SHA-256: c3aecd53736889345b75ebd9c5450d6110af025517e7b2b189a5a805f7673f2f
font_01_sfnt_off00010dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDA 12240 bytes
SHA-256: fc8acde4f015b84e2e32fc77e10ad8e7e5481fdf4b26900ab8f00490dd03427a

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