Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3b4a345cce7497…

MALICIOUS

PDF

68.3 KB Created: 2020-11-20 20:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c51a03e018f8e450cd6177e3f06cf9fb SHA-1: 2805feaf747faee95ac61e94c5eea0a52c761e17 SHA-256: 3c3b4a345cce74972cb6b59aac70092c58a32c6951def3b93d9648a417a2dae8
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 a suspicious domain, likely used to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to downloading a bill of lading.

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://traffine.ru/123?utm_term=bill+of+lading+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fb2ca31416ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_5fa63068d9c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5faa2648c2a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_5fae2c620c820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f89614d28e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5fb4a2e42be44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b25b3d6-1f0f-4af2-a777-1e3e052bd601/11133863640.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/lelamigaves.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/english_cartoon_film_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/wurevovulizimazemib.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/vuwixinatazokozewozab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c19ee0-86fd-4c2c-9f8d-ff210b8b97fc/welcome_to_the_madness_yuri.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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 5172 bytes
SHA-256: 3c1a4fed41e77fab51b7d87c350c6402202434ad4ce56153609a108f46e5302b
font_01_sfnt_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 10140 bytes
SHA-256: 56c45bfcb5c7bb322034d6db8ef5501a11334a40158f57385adc6c2f17a92e9d