Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b99ad22e557f827…

MALICIOUS

PDF

111.8 KB Created: 2021-05-30 07:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dde393eef1f5a4fe897d34c6bbc173c5 SHA-1: 1611dc4d97487f1f1dd4879da5f494a393f2e6c9 SHA-256: 6b99ad22e557f827b1e3a6de1376437bedfc3398c7c6c5407b38193278539744
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 detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to contain keywords related to the URL, suggesting a phishing lure.

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://xajibur.ru/strik?utm_term=rock+band+4+ps5+compatibility PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381988/normal_60174611de713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_606e70debe9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_601b3d4a7a68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_6063e9c2b103b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_602af727df261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5fe78850ba0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_5fd666cce6a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_6069383fc1aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_602123f973a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_605643ba710fe.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450244/normal_60b1a6d222bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_6065b54202836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5fe6c040afa67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_5ff46538e1471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_6041e1a4e6eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_6049eee77d704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f22ebd6-0f62-4feb-b2bb-65c0311c478f/sitcom_beat_sheet_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a68f62d-ac22-4254-8b37-8cb2239c4158/first_alert_sco500_false_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0b02c0-6388-4e4c-8591-015c7e4b1c0e/how_much_is_a_browning_a5_12_gauge_shotgun_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7026371-b31a-4a15-9b12-ea8cb5ee779d/zitifopoporudijexozatafaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d451cf22-8962-4c43-b75d-61b47ac6da10/dan_brown_new_book_after_origins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726bff85-cf9d-4c4d-b749-528465ecff16/the_road_back_to_you_podcast.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000177b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B4 5648 bytes
SHA-256: 0cfe8ed8dcbb8a35f38ef41574929f9e58582de8a7166f4cc31bc323440951f6
font_01_sfnt_off00018afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AFB 11380 bytes
SHA-256: fc5d5d41ae4c838e1f29a67499e93c773c71742897db1c26e0d7d71cf1427530

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