Malicious PDF — malware analysis report

Static analysis result for SHA-256 862f5c361fdb17a0…

MALICIOUS

PDF

103.8 KB Created: 2020-11-14 17:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 90c6a16ea6b8cbdb002f24fc1742f3d5 SHA-1: 5e6335d0c67c003bef4cd3c483c57c5a3fa5ebed SHA-256: 862f5c361fdb17a01d6c86b016b387669976bcc7f48cc352da6d8bff3538b0b8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan PDF. The presence of an external URI pointing to 'traffnew.ru' suggests an attempt to download a secondary payload or redirect the user to a malicious site. The heuristic 'SE_DOWNLOAD_BUTTON' further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8938

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=the+crucible+dialogue+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5fa83d06121a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f917dccb4352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/dadupawo/vibanezegunez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d170bf-f460-4089-83ce-0d4d883e13bb/30524612304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e46a4de-7479-43e1-ab62-9c90c51dce13/58520077373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a169700-8fa8-4403-b511-2c890ea24bc5/5800259990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed59da23-c3a9-49c2-87cd-01a6f47e3ec4/19229141125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd18668-73df-483d-b264-7097f7b3a713/age_of_ascension_release_date.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14226 5444 bytes
SHA-256: 8f89a4305a00d2aab43c0107c328962f3e590c2d345e7176ad02d1ea86d74174
font_01_sfnt_off000154a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A7 5896 bytes
SHA-256: 928a9ccefbc964dabc3f0fed5c008bd6b6a6fdc86ab62b18a48e4939ef43f9f0
font_02_sfnt_off000163a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A4 1812 bytes
SHA-256: e4609f833d531629f5f5f2b7397568dbf5c4bde8d372f7694cd0103f58318415
font_03_sfnt_off00016c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C7E 10940 bytes
SHA-256: bf2468287f4848419dba3e9e40586059f87f781a5fc3d60d9b0112a9350d2981

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