Malicious PDF — malware analysis report

Static analysis result for SHA-256 c085dd9cbe1e495b…

MALICIOUS

PDF

84.2 KB Created: 2021-04-02 05:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfc6802138d98c60aa52332b0bd99bb SHA-1: 29be830f2a9aeec1ff8e1ef57e8f63611b8c5d04 SHA-256: c085dd9cbe1e495bb9a0f374bd38a8bc9c97bbceffbbe1ecf0a9fc9db8ae0590
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest the document is designed to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=usps+zone+map
    • https://static.s123-cdn-static.com/uploads/4460071/normal_6002c04b870bd.pdf
    • http://kuvewumewatono.22web.org/poemas_de_amistad_de_pablo_neruda_de_4_estrofas.pdf
    • http://umdtheatre.ru/jaziwiwaweziraxilaju3lwjr.pdf
    • https://cdn-cms.f-static.net/uploads/4421038/normal_60234e181d39e.pdf
    • https://cdn-cms.f-static.net/uploads/4408348/normal_604a21a244a77.pdf
    • http://nikecortez.net/yx28x4_graph_brainlyz31d0.pdf
    • http://hushseo.online/multiplying_polynomials_worksheet_answer_keyfrhhw.pdf
    • https://cdn.sqhk.co/kukelagalefe/gGKlgem/35726817611.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn.sqhk.co/wesusogewu/3ghijhg/25772114270.pdf
    • https://cdn.sqhk.co/govazofaj/haiacgi/87885217841.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5f4278e2-8fbb-4fb1-8a39-b2f8e959776d/moriwuzezuge.pdf
    • https://uploads.strikinglycdn.com/files/55cead0a-74a6-441b-b776-796c87f4ac8f/google_project_ideas.pdf
    • http://jabegijazuxag.rf.gd/lesson_plan_in_english_grade_10.pdf
    • https://uploads.strikinglycdn.com/files/4c4b1861-bebd-4491-9fa7-6efdc2fde05a/easyacc_power_bank.pdf
    • https://uploads.strikinglycdn.com/files/85d3dba4-3633-4d03-8003-93cfc76f7d8f/77699721662.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f255.bin
e628fe5050c0e75bb0fd6fd27560ae359163d2b8ce9fc4aeb3a7f26b363d9771		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 4536 bytes
font_01_sfnt_off0001018f.bin
75a5ab0a0065b70aa23a3531cc26a1bf0c5ee418b4f801f1c3164b8cc2a957ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 2108 bytes
font_02_sfnt_off00010b3a.bin
d5587c038a36a4a88bfd0de07b6b065cb453531890c266cae12aaad77216b7f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 12204 bytes
font_03_sfnt_off00013453.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13453 4324 bytes

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