Malicious PDF — malware analysis report

Static analysis result for SHA-256 a780b797185e8653…

MALICIOUS

PDF

69.2 KB Created: 2021-01-10 01:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f218e745811270cb516dd751c705e22 SHA-1: dd02704c68668b687fdeea785ab5b1530c046d2d SHA-256: a780b797185e8653416ed779f1b2342a127265c357a9a1aabf96d4e80949def3
154 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=ice+cap+zone+piano+sheet+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_5fb532a6a5095.pdfIn PDF document text
    • https://cdn.sqhk.co/wikikifigas/9gfjdgf/margherita_pepperoni_gluten_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5fab5de62c91b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fce5d8983a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f93be3b1d35a.pdfIn PDF document text
    • https://cdn.sqhk.co/mamuxejoxe/gheeQOv/10853717438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fb61f71c518b.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/jijcqii/53426166442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fb822cc83a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f89f8f8d0384.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/pazatuv/61517058559.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/the_beauty_space_musgrave.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/63498040393.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/medina_county_jail_medina_ohio.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_off0000cf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6A 5032 bytes
SHA-256: c2713ed946954e3bd2cc2be0fe3c290a382edce882e8dd1ae80feb37e7230157
font_01_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 12112 bytes
SHA-256: b1221bc94f3c052662d3a4897f862ea97f6f63ad2183b8d5780c6b3be40352fd