Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc0c2faf1113f5e…

MALICIOUS

PDF

82.6 KB Created: 2021-01-17 07:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3fcc85c9f6a89be1b4f590c90837e6e6 SHA-1: 2807a14f17bc548ba8e0eddfd19f3f2c5eb319fd SHA-256: fbc0c2faf1113f5ec9076fddaf9bf1444d417764c2872cfddfb140c11f6ede50
244 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the critical heuristic firings related to malicious redirector links and a link farm. The embedded links, such as 'https://cctraff.ru/123?utm_term=septa+r5+fares', likely serve as entry points to malicious infrastructure. The ML classifier and ClamAV detection further support its malicious nature, suggesting it's designed to lead users to harmful content or downloads.

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/123?utm_term=septa+r5+fares In PDF document text
    • https://fobanuvoba.weebly.com/uploads/1/3/1/6/131637247/3266782.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/8193011.pdfIn PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/puxebekedikave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fe59be455d9d.pdfIn PDF document text
    • https://nadatipaj.weebly.com/uploads/1/3/5/3/135347779/70ac1a89450965b.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/ee6626f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_5fea2d29d4547.pdfIn PDF document text
    • https://tipiwaterexiw.weebly.com/uploads/1/3/3/9/133997214/podumesopa_mujawaxalufo_zapubedunelo.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/Siaibhf/80799896780.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/nivegixadejupam_pakabuzaja_vavunobop_sidarezogo.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/djLgfRJ/galaxy_invader_infinity_shooting_2019_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5ff7c3b22b96e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remufuzu/72152177267.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 4612 bytes
SHA-256: fa605fab2552cb892d74f0c193df7e72b58d3077d4ec225e971c0c4dff1d5882
font_01_sfnt_off0001097a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 11096 bytes
SHA-256: 691978c37cede53d849e22290e032739a829cc890f733ca88a80254050115715
font_02_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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