Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b06301151afafc…

MALICIOUS

PDF

71.0 KB Created: 2021-02-21 08:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bcdff6e8542eb64a5b6ffb26462c98b8 SHA-1: 8e0f79ff127881febee4c15b7a8bc447821f0111 SHA-256: 82b06301151afafc55501adb2255724ee4e31e75cc26bb84710290cf1c320197
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating it functions as a link farm. Several heuristics, including 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', confirm this behavior, suggesting the document is intended to direct users to potentially malicious or phishing websites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=hunger+games+book+2+and+3 PDF link annotation
    • https://cdn.sqhk.co/miwataxanis/gfhiifS/fake_gps_location_spoofer_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/8N4bCXg/xesewumafubozetorabulipe.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/cYjjagi/55122635292.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/2013_buick_verano_parts_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/fhdiTdY/gemurasokitogapuwobatu.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/salatul_tasbeeh_ki_namaz_padhne_ka_tarika_batayeylitk.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/ggjhifx/word_cookies_rose_12_answers.pdfIn PDF document text
    • http://batut.space/draw_car_3d_online_game8cqbt.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/gxhhO8w/reuters_news_tv_app.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/6f0b56c295cd09.pdfIn PDF document text
    • http://rerulekoba.66ghz.com/four_lines_handwriting_sheet.pdfIn PDF document text
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/3015673.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/wizidimawag/how_to_log_into_your_icloud_storage.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/kofogujelude.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/uk_visa_tier_4_form.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_off0000d906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD906 5576 bytes
SHA-256: 1ccef4e27f994b0732961b190ebcc3345570a56cca877ea63ad0bc2f7c71950c
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10408 bytes
SHA-256: 2ab6cd6ff9522376f579fa992373f5304799742e016516df4d4986ea5e28c17b

Open this report in the interactive analyzer, or submit your own file for analysis.