Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0255d6c9428c1c5…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 19:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9b593773ba4dcec94d99e1767467abf3 SHA-1: 788c465cbaf42db49b9067d35e147e08ad4efa9f SHA-256: c0255d6c9428c1c5fdec454e3861b8c80522561b4adecee5e51c9e967a828437
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://baarspo.ru/award?keyword=the+original+illustrated+sherlock+holmes+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5ffce380d30e5.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/rirolibir-xupugusebuku.pdfIn PDF document text
    • http://gidpopiteru.com/2670229765599g7e.pdfIn PDF document text
    • http://mihetos.xyz/lodekusoxirejowewega7n.pdfIn PDF document text
    • http://usmileofficial.site/pexodisokpoltp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_60268589b6283.pdfIn PDF document text
    • http://yoptan.space/runelametesukusogewevu29ymf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_602865b9ee8ac.pdfIn PDF document text
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/344b06d2bb2cf4.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/6ea40973adfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487618/normal_6026983c2f428.pdfIn PDF document text
    • http://specialsale.info/xuzutukafabe4a9w8.pdfIn PDF document text
    • http://myyshooop224.site/denon_avr-589_hdmi_audiogrmc6.pdfIn PDF document text
    • http://boxberry-24.cc/stock_trainer_virtual_trading_stock_markets_apkefgg5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375083/normal_5ff269950b93f.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/bewibiwat/76381416645.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/50187990174.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/58534407374.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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 5584 bytes
SHA-256: 44145ebfd0e17c9df3a9fc2204a8528021fa4e13f43cc7d94d447e9cbb2a6431
font_01_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 9964 bytes
SHA-256: f0caf5a802e5650582f1ba0e66127d270cce6d080ec7cac9547e4174fa913bf8