Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1a3b924d523180…

MALICIOUS

PDF

65.4 KB Created: 2020-12-30 12:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a888c32bff5122891c6e5d0f66fb436d SHA-1: eccf2084fc1da5972a1a90d7e25050c73d7c8c67 SHA-256: ba1a3b924d523180ed90428c81912398ae7ada4f19b8c3a894f59823d01e9085
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic firings point towards an attempt to exploit user interest in game-related content to redirect them to potentially harmful sites.

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://trafffe.ru/strik?utm_term=mods+prison+escape+map+for+mcpe PDF link annotation
    • https://tofabefanij.weebly.com/uploads/1/3/4/7/134726630/tukukebebejoxis.pdfIn PDF document text
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/nigudop.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/25d37c044e.pdfIn PDF document text
    • https://riwetomawojok.weebly.com/uploads/1/3/4/5/134516188/suserufoton.pdfIn PDF document text
    • https://sagizebuwajap.weebly.com/uploads/1/3/1/4/131437005/nuguve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5fcf0a7d99dac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd5fd4e59b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5f8d3c25ae466.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/eYWieje/descargar_fernanfloo_saw_game_para_ubuntu.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/84db0f2a-760f-426e-871f-b8f45c655b01/81587711257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43914c4-ed1b-4929-99f5-2726f4f294a3/17111453414.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C5 5276 bytes
SHA-256: f6244c608df40ff4f0812c37557a783b8d2f60f2d19a957d6b144d3aa0351f5a
font_01_sfnt_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 10340 bytes
SHA-256: ddda54cfe52e7512c436c16228e2f04d67407029a67d02257766ba0aa9418ac8

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