Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc6e83e5a967c92…

MALICIOUS

PDF

98.5 KB Created: 2020-11-13 04:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 04f4a1db06f6d37e56e52885cc43a310 SHA-1: d3c2248f7ed7cff14161410855c7975eb56ffc51 SHA-256: 0bc6e83e5a967c92b67162671b2c337dd6e3b9523328260a480479d596dd7904
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=how+to+download+selected+variables+from+the+brfss In PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/3bf4f67.pdfIn PDF document text
    • https://dipejabixeg.weebly.com/uploads/1/3/4/7/134716175/wonanosutun-fakezef-javok-roxarubilu.pdfIn PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/winofenajirowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_5f9961902ff87.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/616168.pdfIn PDF document text
    • https://kowedanu.weebly.com/uploads/1/3/4/6/134687265/4425203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5f952bf615c4e.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xanixaja.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/5519595.pdfIn PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/250127.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/wigejowijureler_miwiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fa3315f9a898.pdfIn PDF document text
    • https://mibelilav.weebly.com/uploads/1/3/4/7/134747519/zinedikurigebilo.pdfIn PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/32471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07306c0-0ec0-49bf-8e3d-c493b72a3902/24072209376.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 16936 bytes
SHA-256: 90bd0eff4a928fdcd90f6a2fa7d7896e9ebf14152787a33f9f825808574cd86a
font_01_sfnt_off000142c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C7 5516 bytes
SHA-256: 9eada0d2fcb3d0b239745dfc05b3e61500127b9b2e5918d5ead9a99dded94910
font_02_sfnt_off00015572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15572 11240 bytes
SHA-256: e1ca0c9314c7e9b8c23cbd9dd2c06eade0c458ed769f4d8b42d4e38fee50b292

Open this report in the interactive analyzer, or submit your own file for analysis.