Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae1728364fc831b…

MALICIOUS

PDF

64.6 KB Created: 2020-11-18 05:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f874211f60cd4f304d97814609f8f2d0 SHA-1: e91067e6823ea968e60f09106b6720fe2b43c7b1 SHA-256: 7ae1728364fc831bca6c9aa75f939d857fdf3f6842711d4163a93c4ab3cb77f9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/aws?utm_term=research+progress+report+uitm PDF link annotation
    • https://latabiwot.weebly.com/uploads/1/3/4/6/134612911/636358.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/fuxerajumovu_luxurunesabas.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/5153334.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/fc9d5777.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/69f3f4ae-d619-4e70-8775-43a97dbf90ab/50957669150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b1f1dd-2825-4e5b-b3d8-4cfe64248a07/guide_to_lock_picking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd34bd7-cfb1-4346-8753-b7e67fa1e5d8/ap_physics_circuits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf94c9d0-ca5b-4f6c-bf61-89f36db581ef/pes_2019_controls_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e478ae5d-e09e-495c-b929-9ab894649d8d/bosulonejubavekusodibureb.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/chromedriver_2._37_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/seated_tricep_press_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2f9878-8721-470c-abe4-a52c67f07abd/84054341501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fbdc30-a4c3-432a-8fea-8e1ac410a3bd/bazifolefovorup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7fd3f7-a0a6-4154-b2dc-bfecd32933c4/vusazujudorelil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346cb9e9-3e4f-4a26-be01-59b770137084/pilogotuwidazitanuxif.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_off0000c0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C1 5324 bytes
SHA-256: 2493b3de5516a34ec90c552135eb940ee59bca8a10001ea33516d69dc7094938
font_01_sfnt_off0000d2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B8 10272 bytes
SHA-256: 7117d6bd2203deb581611baf712e12679b0cdad4050a21aa1689de4061ef204d

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