Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2792803d91fb58…

MALICIOUS

PDF

63.3 KB Created: 2020-11-13 00:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5a30841d3d503d6e1e86e6959a78072f SHA-1: 954a7196a12b8cf601201e11d5cfe126a482d902 SHA-256: 6e2792803d91fb582eee36e06326fb0847ff18f5f44d54aa5db7553956052bcf
156 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 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/strik?utm_term=youcam+3+full+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8789e589dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f965356a9308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5fa3dcaf16c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8738515c616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450138/normal_5fac19252dae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fac50e36117e.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/2743582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f9d1b8a7116b.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/tevigotu/50640954140.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/boston_to_montreal_road_trip.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/45071727867.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/ruvuvexusigesasefesid.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_off0000bc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC32 5204 bytes
SHA-256: f95e81e6cba0a388a9eca48351e43cb7e7bda69dbb3de1f9e4321af2e7b14a4c
font_01_sfnt_off0000cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 10052 bytes
SHA-256: a931d2307825d98e6c3e82f6e65b3478336902385b70c03a05957bf285230733

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