Malicious PDF — malware analysis report

Static analysis result for SHA-256 64755f0da6815428…

MALICIOUS

PDF

63.8 KB Created: 2021-01-14 05:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 78e43f8cc65aca4246fae089c9d74f8a SHA-1: 1e1faea7e5f0c133eedfc3aff772e42d1bd0817e SHA-256: 64755f0da6815428cd6c957f5026b1bb8820cf5e10d83213c51318bf9616b92a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, including one pointing to 'trafftec.ru', suggests a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, potentially indicating it was generated by a tool for malicious purposes.

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://trafftec.ru/aws?utm_term=mario+benedetti+la+tregua+pdf+descargar PDF link annotation
    • https://cdn.sqhk.co/fekesolip/Njahfjj/emergency_ambulance_sound_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/GhdKgge/route_66_roadside_attractions_illinois.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/idjbgfh/dingo_ate_my_baby_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/jaiagjE/bisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_5f9512727e892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_5faf28311c1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f9172e19d6d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f8f613cef16c.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/Phc3fjj/nisib.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/ngghfgj/gikugajarubapevogobok.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/jolunenafobuw/nusugezajejojumunekedut.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/korean_fashion_style_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/do_villagers_respawn_after_a_raid.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/silhouette_aquilo_piano_sheet_music.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_off0000ba2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2A 5468 bytes
SHA-256: 84f6b003d0b1c8a6515b91f2729f557699709d588a36f4f2440273d7d0950ec2
font_01_sfnt_off0000ccd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 10876 bytes
SHA-256: 38fab7a5e88cb871858c75100c1742c1d6dbf6249786c4e9f3cf3ee2b9d80db0