Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb0e1c22b6d7e0f…

MALICIOUS

PDF

69.4 KB Created: 2021-02-19 17:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6dbf0232dd1c41a6f78a153bc94e97ad SHA-1: a48847e46e90155852ffd9b4e764e2d90c8b8226 SHA-256: 0fb0e1c22b6d7e0fb969fb56536b26d3a49ce8d276e381939441670f0ba2ffba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-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://baarspo.ru/strik?utm_term=how+to+reset+mp250+canon+printer PDF link annotation
    • https://cdn.sqhk.co/bipadifudame/jijbhjc/football_teams_in_english_premier_league.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_602915a39bccc.pdfIn PDF document text
    • http://salonvarna.com/pelowusibu2cbx0.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/Vyil3fd/pisujenonojagewesi.pdfIn PDF document text
    • http://vonowaz.iblogger.org/all_android_versions.pdfIn PDF document text
    • http://agencymedia-ig.com/super_dancer_chapter_3_dance_winner_2019_namesc9q4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378165/normal_6004dc6be0ecc.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/Xgcgihd/android_accu_battery_pro_free_download.pdfIn PDF document text
    • http://bigswinner.space/lirepotesouyspq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5ff9a8199a429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_602ea447c2b8a.pdfIn PDF document text
    • http://detonic-italy.website/pedigree_worksheet_biology_1_answersaibwr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fda546f10c6d.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/mefadedosuw/coronary_artery_bypass_graft_surgery_guidelines.pdfIn PDF document text
    • http://xazinipigoxowe.epizy.com/kunexenanasoges.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/80378530064.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_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 5500 bytes
SHA-256: 8c42e4a977402e49fb24ecfc3afae6a3c65904b5e4cad478b02224188679a9a3
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 10632 bytes
SHA-256: 2e7f3b83fd601947aa0d8b692b125779476245edf859218a90d28f468358b2ec

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