Malicious PDF — malware analysis report

Static analysis result for SHA-256 75718e787dfcff91…

MALICIOUS

PDF

65.8 KB Created: 2020-12-17 21:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b8c2f20554ceda8265de44398f1236b SHA-1: ea4ab9b141bde98ac1b33ada6d160d289d9061be SHA-256: 75718e787dfcff91c3385e8ed2d6fbc0afbbacda1005f7d5dfa9bc374fa0ca6f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=behavior+intervention+plan+template+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/ballade_pour_adeline_noten_kostenlos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50419a3bf4b14abc377c2/t/5fd226ceb91f50015ef6f32c/1607608015710/teporerekarujobabibeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc645f12e537a05ef2d9efe/t/5fc6cf302ac13f1ee9a726f6/1606864688997/rusafojiranaxug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc1ee6e3485235c860c415a/1606545008239/goduwonatogapirekojutaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162144d2-99b2-45b1-bc8c-35a44f6194eb/2010_rav4_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/luzug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d5be12facd59cec62577/t/5fd1eb44b91f50015ef0a548/1607592773335/11490933512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303ba35c-9f92-4a54-8030-56c288b96c09/mosquito_lake_state_park_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/64475489372.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/serinituxugowazurafe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5bf0a2757459be32ffe/t/5fcd9dde662d5e24e0bddbc7/1607310814989/japanese_alphabet_kanji_translation.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_off0000c33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33D 5212 bytes
SHA-256: 4b36db8ecc7118baf2bffbf92a0a7f2be71edd710796916970c088a62354aae2
font_01_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 11400 bytes
SHA-256: 04b27544015a0ff8309bd54586b7592f9d64bc6bb55e98b1da7e98e1ce8e7522