Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d3b040c0b83914…

MALICIOUS

PDF

84.1 KB Created: 2021-01-06 10:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1816538f49e7528f1ad0b6458c8dc339 SHA-1: 97eed6e3d7b53283f1995535d3c74640a5478c65 SHA-256: e5d3b040c0b839144b435bcdc6406482358a44b7c5606acc934123a8689e92eb
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 URL that directs to a suspicious domain, likely part of a phishing or malware distribution scheme. The document's metadata suggests it was generated by wkhtmltopdf, and the presence of embedded URLs points towards a social engineering tactic to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=pdf+letter+of+recommendation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fd04c1fd5810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fc04fa20b230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373992/normal_5ff22f912eeba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_5fa87641ca86e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f97c2f380cb6.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/bhdhI1d/drivetime_houston_tx_southwest_freeway.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fde12a1859d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5fca01e182725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486981/normal_5fc85d352075f.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/bjgji7N/ripoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a9900d61b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8726be4216c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/samopakamefap/test_coverage_matrix_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/wuzejelipuxitukijese.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 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 4776 bytes
SHA-256: 86eedb67cf6298b6efce1d8acc269b112fbd2e7905de63ee9e087716fef8b38e
font_01_sfnt_off000110ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CE 10760 bytes
SHA-256: e9d193a7305b8df29799d2e0a67f582dfd042467c69fda93cae74df46a1c7261
font_02_sfnt_off000135a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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