Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7151b682ccb82a…

MALICIOUS

PDF

69.8 KB Created: 2021-01-01 04:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d47865179a8cd1631b02faab01ad978d SHA-1: ef1039fa603bc208a3b4c6504ab0e7ba229fa02b SHA-256: cd7151b682ccb82afbb45509c79817c105500329a273528499b29b487819847e
96 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafficel.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

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://trafficel.ru/123?utm_term=corsair+obsidian+450d+dust+filter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f99e357f364d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5fbd4bdcf340e.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/jC3HSgg/73846527846.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/jnhahfB/mamokagefexif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_5fdb609531e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5fdac63969426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f9685a76caa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fde6a718ef36.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/geghibZ/best_face_masks_for_mens_skin.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/genijusemu/intent_bundle_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/80785392647.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/c_est_la_vie_remix_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/civil_war_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/12851952696.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/digital_marketing_books.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_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 5300 bytes
SHA-256: 0bd1722c7b61557109a30d05fb8886cca05a605c87a11c9ba586071c4b770b00
font_01_sfnt_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 11284 bytes
SHA-256: fc0e45b0aa86fe5f5ab8dfd8bdc81f8ebdfb54629135ee7e7531bcd169d2bf59