Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de0d7f29efd1d05…

MALICIOUS

PDF

64.3 KB Created: 2020-11-18 14:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2bee2924d9e3e95493b2a32cdfe0d4df SHA-1: dfbac0d6ad7b6a86b92c16f3317ddc21fbd60807 SHA-256: 1de0d7f29efd1d0501e3b633cb77a8510afff9447319852d05fe3ecf392c9481
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=character+traits+graphic+organizer+b PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5faa8cb267493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_5fa6eec61bbca.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/lajidaxebebovazakupo.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/sodidapesed-levevew-sagus-wokufafavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f93102e8675c.pdfIn PDF document text
    • https://gedaxafi.weebly.com/uploads/1/3/4/3/134340736/585846.pdfIn PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/692490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fb252167556c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fabed5571517.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/2d13e55b-a48d-4cb2-a334-83b462a3d93e/scoutbook_parent_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1da9e44-d57c-4e50-a0eb-6a1eb2b412d6/baravizexiferazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b881142e-2cfb-4ee2-93c8-0a935be4428d/2406246858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f14b1bb-46e3-4190-9b31-637e7c959f3d/scrum_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28b6be0-9594-4067-b430-220f578e7a1f/rasuxekagimosori.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_off0000be5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5A 5260 bytes
SHA-256: b64313d79fcaf061a9cead76768d7b351a597efc1c2a091c9cf0a629e0ad5c3b
font_01_sfnt_off0000d035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 10200 bytes
SHA-256: 0f47f958326e419697d4fb5512b7bad56c8528e5be16dfd39bd7ca79dba8ad0f

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