Malicious PDF — malware analysis report

Static analysis result for SHA-256 e536b2f11982403a…

MALICIOUS

PDF

73.6 KB Created: 2020-12-22 20:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 583e9f5fac56be392e1e6522d42abc7b SHA-1: b498789a9d169e4c82c52846e3256650b787e882 SHA-256: e536b2f11982403a49fbd03f95fb51718a925ae18c245a271b1ed4082e8dd268
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=what+is+motor+behavior+kinesiology PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9744b6ad1c7.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/2274bb82-8613-4f4f-9f47-c4f1f2b8ef1f/17295589308.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/84974023666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a542a0f-f0f7-46d8-b201-4bc77ee1e824/23258193768.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/11035158479.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/94595800711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b77a958-0386-4678-9836-4e878a4695fa/29408260651.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/44887295872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c724f883-0109-46e1-89e6-881252b16f16/personalised_number_plates_transfer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb940ec-7c54-4af9-a77a-30a52343b7aa/63457173365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869df286-b3bc-4887-bdfb-29c319cde4d6/23831352232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626d50c2-8aec-4c12-8fc0-aeea24d4f227/gabriela_zamora_facebook.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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5476 bytes
SHA-256: b6aeb93385d24d255665d8b1478e14dcc186270f144b2d1691c2011a1ce357ad
font_01_sfnt_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 10212 bytes
SHA-256: 4cf1df48c260b9c534014770bec535aa45483ff21b4e947ee10206dbede4f287