Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b9a327e45990cd…

MALICIOUS

PDF

74.6 KB Created: 2021-02-05 07:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4f50ed4630917fc9fbbb01339eeac9b6 SHA-1: e7eaa9c18922789252e582113b23c4300434a0b3 SHA-256: 28b9a327e45990cd5ba02ff532259d29ab52f00712fe4e9a3418558f03e32fcc
126 Risk Score

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://bologen.ru/aws?utm_term=asset+management+company+pdf PDF link annotation
    • https://cdn.sqhk.co/fasotaluvose/66dophh/74606473640.pdfIn PDF document text
    • http://lokogosomezik.iblogger.org/free_office_door_name_plate_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_6007ba5d56298.pdfIn PDF document text
    • http://lemumelubijene.iblogger.org/xarib.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/gfgiaBs/modunuzutalakafujifi.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/abThbjc/marble_run_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_601ab6f31404e.pdfIn PDF document text
    • http://wikuseweluwi.iblogger.org/tobemewaxupukosez.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/49fgdgd/pase_elite_sakura.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/d8ieJgg/vutisaruze.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ieqkby0/enemy_strike_mod_apk.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/debamijizozexo/wopifapavovowivofitiwizub.pdfIn PDF document text
    • http://wowawese.rf.gd/fazugesopumibasomi.pdfIn PDF document text
    • http://totofexux.epizy.com/77898984802.pdfIn PDF document text
    • http://molugafew.epizy.com/mevozejixunoxesanom.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_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 5436 bytes
SHA-256: 586c9fce0c3232ee7d7402be10e7fa6d34e87d5fb1a9d058fdcb2f39ce8eddb4
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 10508 bytes
SHA-256: b4aaab8fce2ae48805c9073f0a857ac7088641bd5ee4d775ec9c22400fca665a