Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdab47a22905a6c…

MALICIOUS

PDF

79.5 KB Created: 2020-12-19 12:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e4d3ffc7c6db8a031b88ed1d76e7fc SHA-1: b0050be3aa0ab990a0519bae41c4fe2a3ba567f6 SHA-256: afdab47a22905a6ca8c1d83e530dbdd225c44398ea28576ff0595573e99c90a2
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=warrior+cats+pdf+a+vision+of+shadows
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/057ee07e36c.pdf
    • https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/gisix-kizega-gopoxozi.pdf
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/0f59fbd.pdf
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/3138126.pdf
    • https://nifisutabunus.weebly.com/uploads/1/3/4/6/134634245/burukusu.pdf
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/sajemoxevevikux.pdf
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd5feb896ba2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eacbdf68-b83a-46e1-94ce-c6e9eaf1ab2e/60590936815.pdf
    • https://uploads.strikinglycdn.com/files/8c662211-f4ef-4f87-bb77-65417de0f35c/thorie_des_cordes_simplifie.pdf
    • https://static1.squarespace.com/static/5fc504ca17e7202640047e96/t/5fd73f6e89566e781f6a6e44/1607941998916/circular_saw_cutting_guide_rail.pdf
    • https://uploads.strikinglycdn.com/files/f9ae155c-e51e-49a0-8186-3f2182f1984e/lujosal.pdf
    • https://uploads.strikinglycdn.com/files/498b0f1d-a6d6-4673-9483-d4d0331103db/boguponodewagozem.pdf
    • https://uploads.strikinglycdn.com/files/4f94fb65-c14c-4d3e-b818-5c20a30a02f5/sedajopizoladikaraxeza.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_off0000f922.bin
ae18915daa531c621cb646bdf93af8a272df4350bcaa942f0d8fcb5cf2758d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5376 bytes
font_01_sfnt_off00010b84.bin
ddd96926455d402d7f1d959a1e2db4add7843e177a788f6b77462ed9dc0e222a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 10412 bytes

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