Malicious PDF — malware analysis report

Static analysis result for SHA-256 911a1b75a85a10f0…

MALICIOUS

PDF

62.6 KB Created: 2020-12-10 00:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 27ef040d47a736bc1525137f9e19735b SHA-1: b570dde7cf71735d1f7ea0845c764ffd6c86625d SHA-256: 911a1b75a85a10f0b9ec5f64b0c96389295eab9df7db8c29a6cf0d4dcb1090a3
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, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, contains text fragments that may be part of a lure. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or 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://traffnew.ru/123?utm_term=hear+our+voice+store+hamilton PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/754c791d-bb5a-4fcd-b074-23d85b3e618a/integrated_chinese_video_actors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0efa07-567d-4841-9377-a921c7f3eeb8/rosario_domingo_meditado.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/aha_guidelines_2015_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/mathematical_biology_modeling_and_analysis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0f8bde434d6c8f04e227/t/5fce9de799b6a7582b47b7d6/1607376360897/maweke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4064fa6-b73b-4312-87e8-8ef17807d8bb/comparatifs_et_superlatifs_en_franais.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd131452f90b7fe52ecb/t/5fc2c1f23f75b166432f164f/1606599156385/swtor_nahut_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae96e62-b015-4d7c-bd53-a3d1d1a903ba/7651292833.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5330e18c5c478ef2ae82/1606374193124/cset_social_science_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a5311f6a4198480ec6e/t/5fc236b3bc819f1cf42247a7/1606563508477/xosuxukosesewagabibidiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72684026-2e1d-4669-8cf7-4de189e43456/kovufibagizajudejiziwibix.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/the_cruelest_sport.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_off0000b5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F2 5060 bytes
SHA-256: b6d27b422ad114537d9d2edf32e1eeb67d322faa8806ce19bb072a40324a49ad
font_01_sfnt_off0000c700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC700 10856 bytes
SHA-256: 977e550c87f6dce9186c1b101bf66fad56bf7a43668c7e2a65e091c8dd6c7e31

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