Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b82922f4df4366d…

MALICIOUS

PDF

65.0 KB Created: 2020-12-05 19:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bfd6001a7903086a6b68fba8098bc14d SHA-1: 1fc3847bf99ba977582af5233152187af35cc377 SHA-256: 3b82922f4df4366d74c329e474d5e6f1548e8133b2c764c857aec877ae8e98a8
186 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. 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
  • 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://trafftec.ru/strik?utm_term=truck+turning+radius PDF link annotation
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/dea39d12.pdfIn PDF document text
    • https://xosotujusosevo.weebly.com/uploads/1/3/4/3/134377620/zepugabitafi-daboxub-zadiworelirezut-mazava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8e7d0484832.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/gusuwurarixe.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/429be1345a415.pdfIn PDF document text
    • https://votuxujalesobe.weebly.com/uploads/1/3/4/6/134683371/fddaa347c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fb2e2c1bc41e.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/gegekeze.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/6d6fee89-71ce-43e3-ac75-6acfbebefeb7/nagezigijukidagisoxate.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/3d_graduation_cap_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d105458a-16d2-4b10-bfbd-20fcf3b874f9/types_of_details.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_off0000c314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC314 5088 bytes
SHA-256: bac633a535833b6698cbc96dd7b8ae15813390bae21987ec5eda2b3f5572c249
font_01_sfnt_off0000d476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 10396 bytes
SHA-256: 5026ef035245c5f987adc93fb0fc7d09cf7c4663f1df95dc69df3ce0fba7fc39

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