Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd0f74ca974ce45…

MALICIOUS

PDF

66.8 KB Created: 2020-11-23 21:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b24fc95bfc5e2c6412ea3a5c4ab47301 SHA-1: 2d2234de2b2696db8527a027801827da51a2f34b SHA-256: 0bd0f74ca974ce453babe2f7d2e819b1809b32cbe005acf666d74d245907ead2
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=legion+full+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8ce50f49a7e.pdfIn PDF document text
    • https://biwurozijusuxux.weebly.com/uploads/1/3/4/7/134724143/4791477a.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/d93713ed-1d31-4094-bcbd-d6776add7576/36319237518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a5bf79-4009-494b-97ad-53a02d936e4f/fawubunomejugogaduxejukuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff09fc3d-e597-40fd-9c63-1205c3dae53f/76769226862.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/music_beat_creator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f19aed-8dc5-4b9f-96f4-ecb7ba94418b/wigufinilefimivatek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b44e3e2-f31e-41cb-8b09-ca1f6a002e60/18149882238.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/deer_feeder_plans_using_55_gal_drum.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/html_editor_app_free.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_off0000c96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 5048 bytes
SHA-256: fe33a3e8ca17d9b4b35108cc7f8d2b4e4a5b1c8b3d54177fea81a0225571be28
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 10812 bytes
SHA-256: 9fa10e5aa687641500d5d53ab5fccb6acf62d4d08f8584d2c8dcb58d87fdb12c

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