Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d150755c3a163de…

MALICIOUS

PDF

67.6 KB Created: 2020-12-30 07:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 275e6fe13ece3b03d9af22f7a11aa403 SHA-1: 05280d332a7f46b0fe0e05098e048ae9c520e302 SHA-256: 9d150755c3a163de482e39ad25b81add018470e65fc24e1395521550ea439fcc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning tactic. The primary URL points to a search result for a tactical weapon attachment, likely a lure to encourage downloads. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://trafffi.ru/wb?keyword=3%20slingmaster%20tactical%20personal%20weapon%20attachment%20system
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5f9af6962c8f0.pdf
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/zoposafotafidiwavuf.pdf
    • https://vokudaxavarul.weebly.com/uploads/1/3/5/3/135313771/6149396.pdf
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fb9eec071d6d.pdf
    • https://gesunujas.weebly.com/uploads/1/3/4/5/134509411/650b95833ae5.pdf
    • https://raxelapanaf.weebly.com/uploads/1/3/4/7/134746791/b792d8f624be41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/08c8093c-98fc-4336-a710-ad8d66f4d9e3/zovibu.pdf
    • https://uploads.strikinglycdn.com/files/949f1c79-6be5-4862-8441-7a83bc21774e/vuluzudiloxu.pdf
    • https://uploads.strikinglycdn.com/files/110e05d2-0bee-475e-9ede-ae38d23cd3d8/sekajom.pdf
    • https://uploads.strikinglycdn.com/files/38ee4420-1056-4ee7-ac02-42d052fdd8ea/thetford_92360_porta_potti_550e.pdf
    • https://uploads.strikinglycdn.com/files/5796059a-8191-444f-81c9-b67a3bad8af5/livro_o_poder_do_agora.pdf
    • https://uploads.strikinglycdn.com/files/33e06ad9-ba5f-42ff-9967-2eca02c46fd4/84000942650.pdf
    • https://uploads.strikinglycdn.com/files/1987008e-f387-41de-b5f9-ad4df7f18f83/physioex_exercise_4_activity_4.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_off0000caad.bin
4de80b7c3e8227e790f06428546ab473e8672cad669f971fb650235fb1a3596e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAD 5608 bytes
font_01_sfnt_off0000ddad.bin
82991a3ecc085ebd01a50a3580cda5092a43108d87223a150580a12f11a9fd3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10456 bytes