Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f382ea121722720…

MALICIOUS

PDF

165.8 KB Created: 2021-04-26 04:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6255d4ec1d50ef9378a27f68ccfd908d SHA-1: c7728366212521cb27d21ce36fac9f0b25599cc4 SHA-256: 2f382ea12172272039b601ff3b08336766e54cf499edec68d10e4afcc455980d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, hosting numerous external URIs on disposable domains, with a high concentration of links per host. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=was+the+little+prince+originally+in+french PDF link annotation
    • https://cdn.sqhk.co/tuxonewebuke/Ojaq3cS/download_girlfriend_plus_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ghjgf13/78947720463.pdfIn PDF document text
    • https://jojumevowe.weebly.com/uploads/1/3/4/3/134314985/522905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_605b6ef707e4e.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/igjhcs5/asme_section_viii_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/lhbkD6L/10282540455.pdfIn PDF document text
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/lazatumuvax_sosobakexup_nefumut.pdfIn PDF document text
    • http://refowozawigut.22web.org/maplestory_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/jaQhhgd/online_marketing_courses_near_me.pdfIn PDF document text
    • https://juloxiwam.weebly.com/uploads/1/3/5/9/135967800/fc24a.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/SjjjjdP/setabomixogavo.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/2377231.pdfIn PDF document text
    • https://loxufoxoxow.weebly.com/uploads/1/3/5/9/135982175/4049276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_6015d5e069571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_603b5b7ea6fd8.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/AgghaW0/interview_questions_weakness_answers_perfectionist.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/toyota_camry_hybrid_reviews_2012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_602e01bfa5917.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/fYigig3/goat_simulator_ps4_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derekage.epizy.com/outlook_email_template_image_size.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/40456126083.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_off00023209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23209 5704 bytes
SHA-256: bea0803eaa42f6dae8fd064872765e64823654aa992dc103973701b712d4336c
font_01_sfnt_off000245e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245E3 5392 bytes
SHA-256: 8861953a0d04ab9b517541405e004dee8357f03b089fe16501ff2bada6e95c82
font_02_sfnt_off0002584e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2584E 16260 bytes
SHA-256: e457d973c8f6c3b3e1e55be95a74cff29bd0c06a7515210e1f9d1fce18ae8c90

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