Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d28f63cb8a6bf67…

MALICIOUS

PDF

74.8 KB Created: 2021-02-02 17:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4de52391562a068f2f55a3bee209f16b SHA-1: c732f92e17318c4c38153d9431289828f217fc41 SHA-256: 1d28f63cb8a6bf671b25ee2b8596e3a7eef0a60ef448717911d55cf91d34174c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=tom+brown%2527s+field+guide+to+wilderness+survival PDF link annotation
    • https://cdn.sqhk.co/nerenina/iBhdKgi/zebra_crossing_meaning_in_bengali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fd600edde993.pdfIn PDF document text
    • https://cdn.sqhk.co/mojerakikav/hgjaLhg/70237488389.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/jgpiouW/89986576469.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ghVijhb/youtube_roblox_super_hero_tycoon_code.pdfIn PDF document text
    • https://buriviniroxino.weebly.com/uploads/1/3/1/6/131606563/ed382f4b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/hd0Bvu4/77394032981.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/1563796.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/6692096.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/eBig3hc/fodazuzepamavulu.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/RjijcIb/wizezupukowibebiwiduna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fc6c6f84bc54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veguxakafopuvix.epizy.com/17834518929.pdfIn PDF document text
    • http://novademovu.rf.gd/outlook_app_dark_mode_android.pdfIn PDF document text
    • http://zesivigodexewig.epizy.com/android_tv_quale_comprare.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 5504 bytes
SHA-256: 7084092467eebc10db67ca2ae9bbc8250250d04e3ff2ee8e659c39909fdb25d0
font_01_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 10292 bytes
SHA-256: 448511adbe1ee877339f0a36cd1e36bb5108145c88322382552b98fb66b6d71e