Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4a505654f13b1e…

MALICIOUS

PDF

68.9 KB Created: 2020-11-22 20:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 12c6db11be7a9062f6bd4a263d437d66 SHA-1: 8e2d8e376e89f4efd349ed34988584484dfe47fa SHA-256: 6c4a505654f13b1ec869c252cbb22478be21ea7de8b3ac36427615bf61f7f125
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'The Great Gatsby' chapter 5 questions, a common tactic for phishing documents. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a malicious intent to redirect the user.

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://trafftec.ru/123?utm_term=the+great+gatsby+chapter+5+questions+answer+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f95a08349633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f8c4bc6b31bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fb29b5bae8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f95bc20e932b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_5fada432ebeec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fa2de0900c53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5faa0cf4382cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_5fb00c8937487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5fa79c4fd050b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wanalovum/comma_or_semicolon_2_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/biology_projects_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/rujitud.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/51102987387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7d87b4-f115-407a-a203-a7e14a5f3093/gipejavemezex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89718b2a-040d-4364-9c6e-d24cb0e37890/tunuzifedobuduzefake.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/hacksaw_ridge_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e2f497-b7da-4f43-8137-419c0671d1d8/vejubafizanimogelipes.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 3

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_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 5980 bytes
SHA-256: 49293956a9393f3e41e29301d64eee2a2c6fbece2a55fdba2f66f035cee4f9fe
font_01_sfnt_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 10456 bytes
SHA-256: 48c2548790920757d1a891c6e7f56e864a499f1fdd564aeb4be4f259203d6260

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