Malicious PDF — malware analysis report

Static analysis result for SHA-256 902fbd1e6e478910…

MALICIOUS

PDF

155.0 KB Created: 2021-02-07 14:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 75ea0cdf8583ce16f85f597250373b76 SHA-1: 561827088ba6a75a1509816c63fbf85e3e66c943 SHA-256: 902fbd1e6e47891085fc8c4d3a34859ad93ed009865365ded830ac5d012594d8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that appears to be a search result, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/wb?keyword=switch%20case%20c%20example%20program%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387711/normal_601755b9b62c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5fc81a5eb60fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_60119d4f0dab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_6019b4e471550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5fef0aa3b4faa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370547/normal_6006c69096dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_601a2b263f55d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_5fe54159584c0.pdfIn PDF document text
    • http://zdsshop.top/56921801811dqsk6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_6000347a28d5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422161/normal_5ffa3ea0838cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5feba0b1a5caf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5ff2f6a0bd816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459028/normal_5fdff43dcef23.pdfIn PDF document text
    • http://vufakitupo.22web.org/towonuwuruwovumelagud.pdfIn PDF document text
    • http://zivudib.66ghz.com/18302112125.pdfIn PDF document text
    • http://nout-prodat.site/super_math_games_free_onlineyydx1.pdfIn PDF document text
    • http://erogan-columbia.site/calling_you_bagdad_cafe6q0ue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444630/normal_5ff5c2d113bdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/aatagallu_2018_english_subtitle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D589 26304 bytes
SHA-256: 13ca0bb9f088b7fac559ef443ab27f2762f3f04340dd9424fbd4f2b3fb202fa8
font_01_sfnt_off000220b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220B5 5832 bytes
SHA-256: 8e481a1f50883ffbca4147e1158bb775721b2d1abec9e5fecb7884ca71694b6a
font_02_sfnt_off0002347c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2347C 12112 bytes
SHA-256: b0aa6ab126988a4704cd997d904c8aa8d94ac9a6f8e3cdec7c5f44b9d8b666a2

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