Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11d9ea5294502eb…

MALICIOUS

PDF

79.8 KB Created: 2021-05-29 12:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f1d6e6ab6ead380b51a51d2b041bfe6 SHA-1: e50c3ac1fd20869a030b7d1cfaf4da5b99872c14 SHA-256: e11d9ea5294502ebdc824f657b05aea051781055cb901d69a0e4ad47d8234e92
96 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 serving a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'apk' and 'indir', suggesting a lure for Android application downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=msp+hile+indir+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5febe0cb3f778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_6030f5194f4d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5ff26bb55a6d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483083/normal_600ea17c0f656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_602001891dc44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_5fe786761db17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_6022558bb8ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_604fa8b1b7378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_602e987fbcba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_603884089d453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481072/normal_6061ed0a21a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_5fd679a9d5d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_6050ec85cd734.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/dd3ba443-3b08-4320-badd-cd2207134187/marketbeat_best_stocks_under_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25844a08-4ef9-49c7-a34d-ccb011f3e0a1/vomirin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c34a59d-0272-401c-8137-36e41e0b657b/tinalewekoxizar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59a1139-0788-43bf-89eb-09723918f787/rawonigawosokipajufuzaw.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_off0000f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 5116 bytes
SHA-256: babe73e5e4397f9db4fe319fdb72b36fb34200605c04c6495dcb12960b4f47c7
font_01_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 12952 bytes
SHA-256: 1ffec7c98e9066e668c2d9fb731f7ef6c37b3837b14589d138ac8037ef07f8c4

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