Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d50eda35eba1c5…

MALICIOUS

PDF

67.9 KB Created: 2021-02-24 17:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 06da40fe93075d8acf8799993c4fcb51 SHA-1: e3e85257af45a84d988402869db4df186e23723c SHA-256: a8d50eda35eba1c536661741cd03837a72d10cbb3b5fb0052f6f90534092426b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=how+to+use+a+woods+light+timer PDF link annotation
    • https://cdn.sqhk.co/metajewamiva/hFgfhaC/48760202406.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/2434901.pdfIn PDF document text
    • https://zowukudikumo.weebly.com/uploads/1/3/1/3/131382828/lavabi.pdfIn PDF document text
    • https://sobapaxuxax.weebly.com/uploads/1/3/2/7/132740961/4708ae.pdfIn PDF document text
    • http://detonic-hypertonie.website/nubalimq1iu.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/42cb6b.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/tisinumukewagumubu.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/vizategilalafa_zegusazines_wunasu_sifezobosimed.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/1034782.pdfIn PDF document text
    • http://pimumuze.22web.org/lavilidizopevi.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/d4822ed.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/dugipikuwibog.pdfIn PDF document text
    • http://jobs-ingenieur.best/litikakizufulosikusubonoysin.pdfIn PDF document text
    • http://stylecurtains.com/pajezakekmz6lo.pdfIn PDF document text
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/tizebepofegifal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 5292 bytes
SHA-256: f55323b81b61ff251c8ac5af904ba5d0b593429b9b31ed64b77149ef0d938223
font_01_sfnt_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 10240 bytes
SHA-256: 0ac13578c3ba4ccf406b6d028ac1e1acc31c4c060e4a99f5c3877d3127de1ae4