Malicious PDF — malware analysis report

Static analysis result for SHA-256 a444f0f96f5e4535…

MALICIOUS

PDF

57.3 KB Created: 2020-12-19 14:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a4ae92893993215b7b54bbfa01f717aa SHA-1: 9cbe8028e2bb0c8a6716ceff4f376a2729adda81 SHA-256: a444f0f96f5e4535499755edaf49fdccc59deb2e16418bfc678ea2275c88c5e5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, 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. The document body, though heavily obfuscated, appears to be a lure related to 'pocket bully for sale texas', suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/strik?utm_term=pocket+bully+for+sale+texas PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd37885b7bc966055e0d98/t/5fdddcebc18bd5077c914486/1608375532370/brave_browser_for_pc_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c920376-da4f-4cdb-89f3-bc982075abbb/count_non_blank_cells_in_a_range.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcab432373c863b887b4f8/t/5fdd0a484f8a400417e1b8d3/1608321609220/85579612672.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/ipcc_report_2019_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82072a0-c49a-4e22-add2-347ed8d7808e/cryptography_and_network_security_7t.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa97b2c-fcc4-4945-930d-867e8ced6901/85292609293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad778d9-ca9c-48a3-a51c-0a7dee01a6ea/lowofizuwodaxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1df7188c99b6d37ae0383/t/5fcdc622662d5e24e0c2c585/1607321123667/numevoropufego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd805775-bf84-4b02-a93e-53752fd49248/puzovuritipu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f91fa3bf4b14abc32683/t/5fd22909ef89ac66837fd106/1607608586881/24154100830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3369b3-02bf-4799-857f-258d8847a14d/jacksepticeye_google_feud_youtube_edition.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_off0000a727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA727 5252 bytes
SHA-256: c7c7dd403cc6d605de680e88ac24fd244ba54bd8d79dfa0f19ca65a4a02915d9
font_01_sfnt_off0000b924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB924 9304 bytes
SHA-256: 4e7e290ac4633f874128b5ba0f3579463f730ebe82bafcf38ef1950fe9d22ba4

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