Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ddb33d7a708844…

MALICIOUS

PDF

151.7 KB Created: 2021-01-16 03:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5bae74cc96e423819f9e9c97e565bb46 SHA-1: 95c9a6f031e4e6b2a014d794e31a40d61dbbe536 SHA-256: 50ddb33d7a7088445f3e89bf798ba7a18a9de669012af99dd52bfcc6ab9dfa6b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, contains text that appears to be a lure, referencing 'Captain Beatty description'.

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
  • 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://traffset.ru/123?utm_term=captain+beatty+description PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f9fae785dc23.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/2613408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f920f64419e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f9618f546761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496001/normal_5fee7847cb747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5f974f4a36b25.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/nepejutoxegoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fadabe718cb4.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/zedudo/41111188312.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/amazing_stories_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/sky_background_for_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/abc_grandstand_program_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/hotmail_home_page_hotmail.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nafuso.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_off000217c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217C3 5180 bytes
SHA-256: 040ab0dcf26e0525bdf571f0d33cb18f0ba67444399fccfc463d0c0deab6971f
font_01_sfnt_off0002296d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2296D 12128 bytes
SHA-256: 191795cf06735045bd10e8bfccbbf4fcd512073255881af191252e6516338a70