Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12b31fb697c44eb…

MALICIOUS

PDF

158.5 KB Created: 2020-12-19 00:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1f982071a0e0f14808ace21b1e6f52a9 SHA-1: ecb241f1ba98ba6fc861092dfa706bbfad4250ab SHA-256: c12b31fb697c44ebd09f077b96b5e948de6f6693fa3743dc0cdf42a4ebf7f1af
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'History of cognitive behavioral therapy pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffi.ru/aws?utm_term=history+of+cognitive+behavioral+therapy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fbf7c38cf9e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f95fd849f450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fa5546512b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_5f992e51ba705.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/6ed075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5fbc0fe81ac4b.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/figidireki/caravanning_tasmania_au_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/average_kinetic_energy_chemistry_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bc0f405d5340f328bb30/t/5fc13b159d79364840ba6648/1606499096133/workers_compensation_letter_of_appeal_board.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/candle_making_machine_design.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/bibemumalanabogizimamuwuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512b7e68-9c3f-439d-b349-483718ae6ae8/spiritual_mapping_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29253a3bf4b14abb3bccc/t/5fcda08aeb18547f4ba01a9d/1607311499952/35236704911.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/web_browser_for_smartwatch_apk.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_off00022e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E36 5680 bytes
SHA-256: 8151ffe7f9d7cbfc3ae4aabfa41710c35667be4baef7ce91d86d641a2a3c21d2
font_01_sfnt_off00024195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24195 13008 bytes
SHA-256: ec94e93b8904feeb9412f2d2ce4bf4739e5ecd85a6c4ed140ff2e09051f7da22

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