Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36533e281ae7729…

MALICIOUS

PDF

72.5 KB Created: 2020-11-29 02:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 90a2c2336a819e6b8070908b733f6660 SHA-1: 9bc6fb048aade092203c6a49be3c575483332e31 SHA-256: d36533e281ae77293182082985c7f36f4ae012dd223113e8ebfa16f24eb79486
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 'traffset.ru', which is likely used for phishing or to download a secondary payload. The document body, though partially garbled, suggests a lure related to 'sepsis 6 nice guidelines', which is a common tactic for social engineering.

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://traffset.ru/aws?utm_term=sepsis+6+nice+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459466/normal_5fb84424ad94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f95a2979622c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f99d32799d9f.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/d91a1dad-6c5e-42a0-b31c-e1fe03fd9375/wadute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbda0dd7-9da1-4a04-ae69-5dd126323abe/pugirana.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/reteaching_activity_industrialization_case_study_manchester_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/vcomp110._dll_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ed60ab-cc08-43dc-8d54-7b04454ee001/28090799785.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/elsevier_journal_word_template_single_column.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9335a4-450d-4281-939e-2199d18a0805/kosezafunaxuwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989dade3-a3cd-4e0f-9644-62ed6ce97fe7/fugujukinifuz.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_off0000dde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 5192 bytes
SHA-256: edbec3b2ecb6b1b23d4f3fb8c3190839e9af2fec79185f58882e8c09d27e850f
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 11128 bytes
SHA-256: e649dee30ade00a01cba3baaf9c2444ea6c177f422448252929c12996061332a