Malicious PDF — malware analysis report

Static analysis result for SHA-256 830d0b051ee92187…

MALICIOUS

PDF

69.8 KB Created: 2021-02-07 20:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 51ce971404c2054067b743bed88c1799 SHA-1: 23d49c36949d76b176c5448c1cc380dd0c0074fb SHA-256: 830d0b051ee92187ca62705c67a894dab0dcc1587cecb86ac467cde5185f0e68
186 Risk Score

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://baarspo.ru/wb?keyword=pgcet%202019%20answer%20key%20karnataka PDF link annotation
    • https://cdn.sqhk.co/lutumodigi/7ijiqCt/pixel_gun_warfare_unblocked_66_ez.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/cBgY8jd/ice_cream_van_simulator_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_601caebf35e82.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/xijuxujopow.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/gibosefu.pdfIn PDF document text
    • http://alphabitx.com/13836932594fu6rk.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/geifjeD/4k_cool_undertale_wallpapers_sans.pdfIn PDF document text
    • http://agent-ritual495.online/tizelukoranadubowi4gj9b.pdfIn PDF document text
    • http://the-job.ru/sefikexasumf1zi.pdfIn PDF document text
    • https://siwukomeje.weebly.com/uploads/1/3/1/3/131383380/9824580.pdfIn PDF document text
    • http://ryduslim.website/excel_bible_2013ixszq.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hgjfjcn/37324190136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girigiroret.rf.gd/gumeloneripopem.pdfIn PDF document text
    • http://tawatibajat.rf.gd/48419002301.pdfIn PDF document text
    • http://laniferes.epizy.com/dajukojiguxududesipupi.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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 5676 bytes
SHA-256: d690b4ad3572865b75bb61db3da180d5d1a490e7a6e8a3d906de5d09b6d399e6
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 10936 bytes
SHA-256: 03759e0b7400450318d57598994bf3f1b66867ecddbcbedf4c164aba78022f69