Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cae2d63110543a5…

MALICIOUS

PDF

187.9 KB Created: 2021-04-08 19:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b069b6b3741b5ce893f180e6aeec9721 SHA-1: 9c0f23ebbf6f47ecaf7416cf24477c139cf8e381 SHA-256: 6cae2d63110543a52bace1ad3ca25bf8757e793e49a67015db8ee4fd843eebf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded links, many pointing to disposable domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to 'Estudios biblicos cristianos para mujeres pdf', likely a tactic to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=estudios+biblicos+cristianos+para+mujeres+pdf PDF link annotation
    • http://pogadai.xyz/particle_physics_simple_definitionpsetu.pdfIn PDF document text
    • http://richmaya.site/69056797231i6vy7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_6064f50b71dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_606ba1f8492e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_600d112de3cac.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/gcxgdib/skylanders_trap_team_starter_pack_xbox_one_ebay.pdfIn PDF document text
    • http://frukt.fun/cirque_du_freak_the_vampires_assistant_amazonaolcp.pdfIn PDF document text
    • http://obuv-kozha.ru/dream_meanings_baby_drowningu1ij4.pdfIn PDF document text
    • http://crawlmqyu.space/18267738752583p3.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/jihdqge/history_of_islam_in_europe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_600f1124877ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5fd880fde5783.pdfIn PDF document text
    • http://nimuxixoxa.22web.org/jitesiluvepifewozulisevo.pdfIn PDF document text
    • http://begetus11ppz.xyz/9157315786755b0z.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://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_35974ec397324a59a1ca89964d4b5a0c.pdf?index=trueIn PDF document text
    • http://gojejamajutemus.epizy.com/pogekivuxeb.pdfIn PDF document text
    • http://duwiden.epizy.com/bidayatul_mujtahid_terjemahan.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_535096cb32744a4ca986e3dd66221032.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_aab13de3c4144d869b57f6e906f845d3.pdf?index=trueIn PDF document text
    • http://nirirojigupe.epizy.com/75244971290.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29572 5356 bytes
SHA-256: 045483c6a525c77df67852e575333b95b9ba41bc604777c4fe19cac23e11c43b
font_01_sfnt_off0002a77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A77F 13680 bytes
SHA-256: 70ba41ef4f360d84b3537cbdfbd55838ea5d5ed29a4e328c086822fed9ca75b9
font_02_sfnt_off0002d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D159 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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