Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdbcce687c942f6…

MALICIOUS

PDF

76.9 KB Created: 2021-02-27 20:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f53f0c798b8826ffc5c9e990adc6e342 SHA-1: ff17f08c275ca4ab08ee5f08857ec12a181c82b4 SHA-256: 2fdbcce687c942f6a357ad46e60eeb488198577c2dd766e4b6f35dd2cb26a495
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 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://pelibifir.ru/strik?utm_term=the+game+of+life+2+free+download PDF link annotation
    • https://cdn.sqhk.co/mepowokugo/jcAl8gi/walmart_money_card_activation_phone_number.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/what_are_the_weight_training_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/hetibIG/xavubutoritatobasoremup.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/6idKTje/saguzivu.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/iihIhaT/zombie_frontier_2_gold_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/jcjdJij/fortnite_drift_mask_papercraft.pdfIn PDF document text
    • https://narefipikabisip.weebly.com/uploads/1/3/2/6/132682930/larujawutipezek.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/iPhfzid/lowotesutukikefu.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/tkinter_download_windows_10_64_bit_python_2.7.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/9ibhdLN/pobew.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/5zxNhfv/guvekomemil.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/geejdjf/73660182684.pdfIn PDF document text
    • http://retamos.mygamesonline.org/programa_para_calcular_integrales_definidas_online.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/how_to_change_clock_on_samsung_microwave.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/Hijy4jc/91075555554.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/gflhcjc/bad_day_at_work_quotes_funny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonanikapudidak.atwebpages.com/32591106682.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/67537255006.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/94793269636.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/betepibesupuzagijunog.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/88338853352.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_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 5316 bytes
SHA-256: 5acee8e0e0f2e592e9d386c91cb22ffe597be86a9a3d2a01be6d1831f56ae414
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 10780 bytes
SHA-256: 251d2a72d26c2373ca0beba5437aefc5ab469371a44292f7b5236b41bc223112

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