Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fa7affeae35732…

MALICIOUS

PDF

69.4 KB Created: 2021-01-16 09:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7d5cf9481f6b429522fe89fefc067913 SHA-1: bcc19d9a7c5f87f6f3a310bdfcb0d902ff643eaa SHA-256: a1fa7affeae35732ad8b8957b458a7447a23dfb430209f2320eb7f378357df71
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, 'https://trafficel.ru/123?utm_term=excel+2013+power+programming+with+vba+by+john+walkenbach+pdf+free+download', suggests a phishing lure related to software downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

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://trafficel.ru/123?utm_term=excel+2013+power+programming+with+vba+by+john+walkenbach+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5ff6d135f07f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fb500a3b0fcf.pdfIn PDF document text
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/pexewilav.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/1495150.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/5990497.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/3516133.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/rawesaragegugar/jeppesen_airway_manual_general.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/song_talk_dirty_to_me.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/nom_factores_psicosociales.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/new_curriculum_planning_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/soviet_anthem_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/mevixupokewowibopufa.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_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 6440 bytes
SHA-256: 21a0dbe9a20678a9a2c127e6a530274566670787c9708a898f14417cee202286
font_01_sfnt_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 10032 bytes
SHA-256: efd98faa6842ccf27714163c8efaefe33f1590fd48fd67fa425a82a60aea93f1