Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9e5750d1f8f3da…

MALICIOUS

PDF

75.9 KB Created: 2020-12-17 18:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 487cd068a113bf1a8c187cfbb9720528 SHA-1: e2c7eddf4161b9b9bb054332a5599313127a7b2b SHA-256: 6b9e5750d1f8f3dad4d484c6f05e51985462c0687c0095e2cac8f04bbf739bed
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 as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafficel.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure.

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://trafficel.ru/123?utm_term=rei+air+mattress+for+camping PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f910be1413db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_5f9a82a0a1b96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409254/normal_5fcbd3df9810c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f87c77dc57e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5740abdb33045eee0e015/t/5fc93cba05199c620426aa15/1607023802710/66514223598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34bba91e-33b9-4508-8d2a-023c40dc3290/8545011284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7552b740-cd88-4a16-a155-25de0477a76e/25404058053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad531f0d-fc36-4011-bfa3-0dbd8dc936e7/the_shape_of_things_neil_labute.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfce564a3cc4058a4b2c3/1606221029612/sam_walton_quotes_teamwork.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a54a05-6a91-4c20-b231-5ed5b4676088/the_dialectic_of_sex_the_case_for_feminist_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029be3b6-66cf-4b57-8624-190ff2ce5dbf/how_to_write_mathematics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b988a4d75e5252f68fd9/t/5fca99c9884cbd21ba16fd89/1607113161632/subway_surfers_online_save.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d8a7d0-bbf6-4fb2-b555-92788d88bdc8/bozovasizugo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc016b9c30a162e0c4e17a3/t/5fc2710b1972c46e3ced0bba/1606578444367/pexus.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/26791054580.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_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 5312 bytes
SHA-256: c711e70dbba4e45a9d51aed32e024624d821f5a089da40486391f32326ce43db
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10592 bytes
SHA-256: afb8c9abc4ba8b5fc146eec27cdced5ce6901177b3b0370b06273195a7fda970

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