Malicious PDF — malware analysis report

Static analysis result for SHA-256 5695379518fe11ec…

MALICIOUS

PDF

75.5 KB Created: 2020-12-28 21:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9618220df9ffadc2ee781c2196f5b924 SHA-1: 5cc95bbb9677ca8337c160d44562a76b944c3bdc SHA-256: 5695379518fe11ec3ae39a57c3238351a5220c3c8870460dfc5b113bc3c2a652
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely a phishing lure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?utm_term=ffxiv+lanner+mount+drop+rate
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fd2fec3c965f.pdf
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5fbfc233618ba.pdf
    • https://static.s123-cdn-static.com/uploads/4388062/normal_5fc7611e5854b.pdf
    • https://cdn.sqhk.co/morexemodoju/dijWhfg/bravelands_book_series.pdf
    • https://vupudotexim.weebly.com/uploads/1/3/4/8/134884591/a30fabd474.pdf
    • https://vavujajakakef.weebly.com/uploads/1/3/0/7/130740385/488db60e789d5e.pdf
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f9f8a33b0f18.pdf
    • https://xaluwidadi.weebly.com/uploads/1/3/4/8/134860769/gofafude.pdf
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f9610740bdda.pdf
    • https://dolakavurig.weebly.com/uploads/1/3/4/6/134647128/80cf8725c3461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4dc9996a-a44a-4004-b1c7-19ed737f0be6/30645174645.pdf
    • https://uploads.strikinglycdn.com/files/3a573f01-3b83-4501-baa7-a78b87b7c27b/craftsman_eager_1_lawn_mower_carburetor_parts.pdf
    • https://uploads.strikinglycdn.com/files/8d4dfee8-c15a-450f-8c12-65912378807c/can_the_wii_u_read_gamecube_discs.pdf
    • https://uploads.strikinglycdn.com/files/18009ff7-63da-4f88-b76a-fc9c40a321cc/nuzomebowe.pdf
    • https://uploads.strikinglycdn.com/files/2cf2ce6c-bb04-47b6-8770-669f3d3daed9/21708132202.pdf
    • https://uploads.strikinglycdn.com/files/867461f4-72bc-4b09-8a77-6bad1654052a/57055524431.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0e.bin
530aab1f6cce6997a07e2ab0b5d09a1acbd2373ed658e495be9bda8bcac0ee10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 5092 bytes
font_01_sfnt_off0000fd52.bin
6de7b95a966471c38d0aaad74a76e2193ba676e1931ebefb8e75a9776d01cea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 10500 bytes

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