Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c80406ed8ca68bb…

MALICIOUS

PDF

84.2 KB Created: 2021-04-05 19:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 430b85867d61e9c7eaec2ed06396496f SHA-1: 796aceedec9acf79a14c0780ae10b2bfe61f2cc1 SHA-256: 3c80406ed8ca68bb51ca05f2c9ee09f6763cb13da66716c9674887426e26898a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host a large number of links for malicious purposes.

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 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://pelibifir.ru/wix?keyword=venta+airwasher+lw14+manual PDF link annotation
    • http://mojenisijita.mywebcommunity.org/general_anesthesia_stages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_5fd9e750462e7.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/bLigxgd/ropezo.pdfIn PDF document text
    • http://dronextactical.xyz/678814873389pmrd.pdfIn PDF document text
    • http://firstsecu-paypal.com/xuzipesisimejp3g1.pdfIn PDF document text
    • http://com-servers.online/9473043164250y3s.pdfIn PDF document text
    • http://souve.me/all_smash_sword_fighters4vx5e.pdfIn PDF document text
    • http://mewudaguzexo.sportsontheweb.net/another_other_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_602a7a0a17205.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/iDheZNW/14153672352.pdfIn PDF document text
    • http://coins24h.com/5687713722833bya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_604314f90ddb1.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/j3DThVX/fishing_game_for_kids.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejawaji.myartsonline.com/13024664397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42f2aef-107f-4999-ac56-0803f51892e0/what_is_the_story_the_landlady_about.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/avril_lavigne_let_me_go_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/the_veldt_summary_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/pimupesidetigezego.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/practical_english_usage_4th_edition_online_access.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44ff830-2988-4ebb-87e8-9e33a847daed/sarah_j_maas_court_of_thorns_and_roses_characters.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 5120 bytes
SHA-256: c1346703c85bdcac64701d12569ba1ef5ec040682f478067b9519bc6fad0102b
font_01_sfnt_off00010379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 11788 bytes
SHA-256: 47e803268ff45e8f731d26341275750a45ee4c12373383b479a443845e9bcbe4
font_02_sfnt_off00012bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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