Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9f111d125f0bc2…

MALICIOUS

PDF

72.3 KB Created: 2020-11-25 23:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3eefc1bf61dbb761c84b7bac523a9121 SHA-1: df3fdc3b37dcf2764d8502bb01a0de74297ca235 SHA-256: 6e9f111d125f0bc28993ffb2a8768c4b7ac7c47430d5c3656b62e5f47d50f36f
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. It contains a large number of embedded URLs pointing to external PDF files, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier further support its malicious nature, likely intended to lure users to malicious sites or distribute further malware.

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://gettraff.ru/strik?utm_term=krups+xp1600+manual In PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/7490818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_5fb5923c3a885.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/6aaae25d2046.pdfIn PDF document text
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/96ab2812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5f9d3dc2a968b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f8d83b6d1233.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/81829c2c0a603bd.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/8960ea086ae93e6.pdfIn PDF document text
    • https://fetofopup.weebly.com/uploads/1/3/4/5/134507679/divulazuterafew.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/193041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f91f534b7516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f93b4ff86593.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/nokiwovowus/5599387474.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/kapadiluj.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/banquet_event_order_form.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_off0000ddbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBB 5352 bytes
SHA-256: 9e88dc44bc2dd72d87802e11c1245dc6ebfe0640a0f5e6da304a4d3c2b3a29c2
font_01_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 10872 bytes
SHA-256: 43a3839aec4767ba193b764cafe1143febb447a2f7a534a38c1881b1417310cb

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