Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf22134a4aa727f…

MALICIOUS

PDF

65.4 KB Created: 2020-11-24 15:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cf58cb0d9396c07b434a674f714db7aa SHA-1: 1cf8386f13ee57e557fdc6d896a12400d8485820 SHA-256: 7bf22134a4aa727fd3357ee41c9204fa19fdf985b7d45ed2e04fddf413270d5f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains strings related to 'wkhtmltopdf' and 'Digimon world walkthrough', suggesting a lure to disguise the malicious nature of the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=digimon+world+walkthrough+digivolving PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5f966f48468b6.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/xonojotelufiz.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/5476235.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/5931802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5faf2a8e70146.pdfIn PDF document text
    • https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/funokopi_jakemuxalimexu_ridubulexam.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/widofafane/raniwisexuluxosu.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/toronto_collision_reporting_centre_etobicoke.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/music_sheet_notes_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f314e1fb-ccca-438b-a740-0f8dd0ae3cfd/mc_wender_9_de_outubro_letra_de_muda.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_off0000bc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC77 5276 bytes
SHA-256: a44afa45b15efc76124e7a927f3900151564da5f1ab743058b1ccdf67818f8bb
font_01_sfnt_off0000ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE57 13732 bytes
SHA-256: d3b506e938ff03f94d8f0a0b4f975f2e2f355974f06622a8164eeba9193b7fcd