Malicious PDF — malware analysis report

Static analysis result for SHA-256 0125488f2fde1a61…

MALICIOUS

PDF

84.3 KB Created: 2021-05-19 23:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b600fef966ec83c9fb9affd119675fb8 SHA-1: 9d8315c05040c97916f15e6f5947dce8572285d9 SHA-256: 0125488f2fde1a617e6eee9a4061fbdaba499a713c34c7bd8a283d8f3f67bef1
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=mod%25C3%25A8le+de+proc%25C3%25A8s+verbal+d%2527assembl%25C3%25A9e+g%25C3%25A9n%25C3%25A9rale+constitutive+d%2527une+association
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fd69d44a58f5.pdf
    • https://cdn-cms.f-static.net/uploads/4472200/normal_60219bb228938.pdf
    • https://static.s123-cdn-static.com/uploads/4366367/normal_5fc63dcc77a85.pdf
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6027f7a9809c6.pdf
    • https://cdn-cms.f-static.net/uploads/4371014/normal_6037e73c07da9.pdf
    • https://static.s123-cdn-static.com/uploads/4389801/normal_5fe42e9fea4c5.pdf
    • https://cdn-cms.f-static.net/uploads/4385412/normal_600a9ee60d361.pdf
    • https://cdn-cms.f-static.net/uploads/4414173/normal_604437daa7855.pdf
    • https://cdn-cms.f-static.net/uploads/4499653/normal_604eccef254b2.pdf
    • https://cdn-cms.f-static.net/uploads/4454671/normal_601b7ba01ac4a.pdf
    • https://static.s123-cdn-static.com/uploads/4378641/normal_60091661997b1.pdf
    • https://cdn-cms.f-static.net/uploads/4368469/normal_603d1af72ccb1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2f6bdbd2-4476-4933-bd6a-d391f990f1a6/wills_eye_doctors_near_me.pdf
    • https://uploads.strikinglycdn.com/files/64e7ac25-671a-4ff7-90b3-249a6f089c34/45696845441.pdf
    • https://uploads.strikinglycdn.com/files/138a53ab-033d-4816-9092-13d9c633a33c/33167941875.pdf
    • https://uploads.strikinglycdn.com/files/e124bc9f-0b3f-4c8a-9f7a-b589b3f18049/10982328581.pdf
    • https://uploads.strikinglycdn.com/files/ae1f1447-cec6-4772-af59-1672fe9370a8/52078851078.pdf
    • https://uploads.strikinglycdn.com/files/42a4c390-d5e4-4b46-a510-1146ae0df00d/87625838540.pdf
    • https://uploads.strikinglycdn.com/files/953ec8a2-1877-4c9f-b185-77ed0d868bed/hp_color_laserjet_cp1215_cp1515_cp1518_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/5d474227-2f67-4613-b22e-97f95fcb4747/3666715874.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbac.bin
064b93cbd9e250856fa8fdd2e285e77d9265c4f3899c27df60296d7cc9462a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 5916 bytes
font_01_sfnt_off00010f2d.bin
7585ea263064cefce43c9d15a4a908a12fff14130f87a17828f995a274c4ee8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 2012 bytes
font_02_sfnt_off000118cb.bin
d39d02e3a9d100121c47ff1819b358bbd7388607eefef69cfa18e69e5df824f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 12112 bytes

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