Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da6120ff43f3c18…

MALICIOUS

PDF

98.5 KB Created: 2021-04-05 14:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d53930d95f2f39fb7bf535f73b4bd74f SHA-1: 369159186cb8e338e2974cf527613c81cd693899 SHA-256: 6da6120ff43f3c18652a18637d2107ea8f51adabb1b6630f7126cc1b56ef010d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/award?keyword=ayatoul+koursiyou+pdf+en+arabe PDF link annotation
    • http://changepass.online/maserati_granturismo_for_sale_2008vmkzi.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/labosusafosagunezobepilaw.pdfIn PDF document text
    • http://detonic-romania.website/trap_drum_pads_guru_apkpureahs2s.pdfIn PDF document text
    • http://xitnet.fun/signing_naturally_unit_7-12_answer_keymlvsa.pdfIn PDF document text
    • http://proflist-barnaul.ru/mobile_strike_cheats_2019wosm8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_5fe920033b3b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fc58be351733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_602d438c1ff8a.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/clinical_chemistry_analyzer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_604fb17c2a717.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/59276828575.pdfIn PDF document text
    • http://hytri.com/9790312652y0p12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paguxesij.myartsonline.com/jotunesekeliwufidip.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/71111740313.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/boi_download.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_91a8453470da478c97d611a2b51e2a15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/97099317785.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_04f9f80585b34237b97c493be9f9ba8f.pdf?index=trueIn PDF document text
    • http://gudugapapilile.atwebpages.com/bedekadusurojukegalew.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/scheduled_maintenance_report_definition.pdfIn PDF document text
    • http://baxewape.myartsonline.com/kifefabibasidofegemefub.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_ac362491dfdf4342be08770cef9e9927.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014af0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14AF0 27220 bytes
SHA-256: 45d2480b24aa1fe7bf2aab92cd2ac5da851ad5328413193be7a0f1e1d9ddf026
font_00_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 5332 bytes
SHA-256: 6e89a5890b790f32872f2fe711c53034f016b2148a5a4cc8c926ece5ed03bd44
font_01_sfnt_off00011a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A08 16756 bytes
SHA-256: 5b7126d0cf70f3356995cf2aa83e88ab41e63f8426987be2e821550ec3d68dc2