Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf6d4eadfc66ba5…

MALICIOUS

PDF

77.5 KB Created: 2021-02-25 19:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f3733f674072159c9b017240b2dea10f SHA-1: 49b63d066747d7072f10c0afd425097b57b5cfa6 SHA-256: 1bf6d4eadfc66ba55ce4c96978e577d93a373511089ed409650b9fca72356f1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure of a search result or product listing.

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://crophysi.ru/strik?utm_term=honda+2600+psi+pressure+washer+for+sale PDF link annotation
    • http://vanimerukaguto.scienceontheweb.net/67218850209.pdfIn PDF document text
    • http://card2card-perevod24.site/tcl_55s401_vs_55s4051d4im.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/exjggjY/cnc_wood_carving_machine_price_in_tamilnadu.pdfIn PDF document text
    • http://in-step.shop/ley_de_inquilinato_hondurasj8n91.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/Mfjdpur/skee_ball_arcade_game_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/ijn85jj/32718513544.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/472314072.pdfIn PDF document text
    • http://idealicaitalia-official.site/pozigew9h27b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454977/normal_5fcd0067a8697.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/iVu5hb9/23815070493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5fec35cfd7f03.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/what_is_the_definition_of_the_word_quran.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/cjfuhjM/vusavenuleduvimom.pdfIn PDF document text
    • http://rubeatyshop.xyz/hotstar_mod_apk_android_tvr94yo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_600172301b06b.pdfIn PDF document text
    • http://handler-autoscout24.com/napegovodebukazigagz477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/stihl_fs_85_pro_carburetor_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/2-_formyl_ethanoic_acid.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_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 5612 bytes
SHA-256: 1b7e8cb51e0ff5d67fab066ebaaee20caaf07f0db04b1889cb7c61a780dce74d
font_01_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 11260 bytes
SHA-256: 7b32e8c1ebd791903f35453bb71bb3c14fd14faca1dbd08c6908cfbc8875e7bf

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