Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c5a508fa545abd…

MALICIOUS

PDF

65.1 KB Created: 2020-11-13 16:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 877f14e5560b955cf6d57e02f2f123aa SHA-1: 91f226215b477fee9e80c4a3777d34329fed56c5 SHA-256: 40c5a508fa545abd4d5c2ee4a47655cf7e9324077d7b4b3e83860a3687538146
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • 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/strik?utm_term=english+accounting+dictionary+pdf PDF link annotation
    • https://bowonusafepa.weebly.com/uploads/1/3/4/3/134319531/dadevub-pimosusiji-ragexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_5fa1418370ae4.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/rasexinaxizipurepis.pdfIn PDF document text
    • https://fawonise.weebly.com/uploads/1/3/4/3/134327557/govonamuwiwibax_renurifumilug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5fa77e623cdc9.pdfIn PDF document text
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/mofiwafus-nazinoti-wuridimidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f8ee5c9df4f5.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/cbb331e1-f3b9-4081-9972-59672d6e77f6/vovokerapibiwiselux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14961499-f7ea-4848-a381-7405cfde9fab/sowebemutezigije.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_off0000c354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC354 5476 bytes
SHA-256: b73c3ef42a5c37d4e82d767608f3539e3ad8df509e5166c3e4665abec4e3f385
font_01_sfnt_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 9916 bytes
SHA-256: ef20899e14893b516e22fc9605d401b5ad2520ac7310a173e272cbe80feef12a

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