Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf6bbecd9af79b1…

MALICIOUS

PDF

67.9 KB Created: 2021-01-14 16:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8e0d9f8cf4760e08aee944ee87456fc3 SHA-1: 4ead1cb57b0dad3a439c07ffaea02e13a9503e51 SHA-256: baf6bbecd9af79b19ceb6cd472fc0ffa50b11eeb74c1e08ff8efb71a2e571041
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of the lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=mobile9%20games%20ball%20rush PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5feeb873899d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391605/normal_5feb6ba12cfd1.pdfIn PDF document text
    • https://duweliga.weebly.com/uploads/1/3/4/5/134593675/00b318278c.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/dhfZVuE/granny_square_blanket_ideas.pdfIn PDF document text
    • https://danabemove.weebly.com/uploads/1/3/0/7/130776083/66a394.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/6737969.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/fatisake/gidasuretujubukij.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/wsiiroon_bluetooth_5._0_transmitter_receiver_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/havoc_demon_hunter_guide_icy_veins.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/64611917708.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/punawe.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/14807036620.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_off0000c9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 5400 bytes
SHA-256: 120c8caeacc1f9028ad3c3ff78e10116f10df7487015d5730d5f33731b00abd7
font_01_sfnt_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 10840 bytes
SHA-256: ecfbe85776f2b57390d3639c4941f4996729f2b8f8a1b68190790849485c21ef