Malicious PDF — malware analysis report

Static analysis result for SHA-256 804de3a9c4d234ce…

MALICIOUS

PDF

70.9 KB Created: 2021-01-09 18:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e868490f4ec8386f1a3c44b0f02f2ff8 SHA-1: fc9c811c06c821ec469d09a89eb20a3d4fd9bb3d SHA-256: 804de3a9c4d234ceac23f54d3b8781d3d4104581bd68f8fcb399cc3b98a8837d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=act+practice+test+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fc665ff8a937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5f93eeedee504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fde5c2274a04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72b38f17c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5fb0337e421d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fb51068d362f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f9ffa7b1c773.pdfIn PDF document text
    • https://site-1177219.mozfiles.com/files/1177219/art_collection_color_by_number_unblocked.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/vekodupiwarobi/doniwuginigej.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/20250178051.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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5104 bytes
SHA-256: bf2614dc8f72f3afe583e8483007ad3b66a86995d9a676c54cd03eba0ad1eacb
font_01_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 10972 bytes
SHA-256: db837eb69f6edcb1192554efa3801c308f9a5fd9f28bcb200f07f398534cec91

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