Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec0bec005fd5633…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 06:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33ea52ae978bfdd70b0a01f530ec5a1 SHA-1: d01f2d75b5a130ed0c4b97e10d737e04b51b9410 SHA-256: eec0bec005fd56339ca9a27853d1bbd3b16053605e884647f29683a9935015e2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a website designed to appear as a search result, likely to trick users into clicking through. The PDF structure itself is also noted for containing a mass external link farm, suggesting a spam or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=jaguar+f+pace+manual+transmission+review
    • https://cdn-cms.f-static.net/uploads/4454813/normal_601ae017d4a26.pdf
    • http://sreda.city/7527732686gx26t.pdf
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5ff75a6609f91.pdf
    • http://tusuvopub.22web.org/obligations_and_contracts_jurado.pdf
    • http://boldly-grow.com/aves_sin_nido_resumen_cortouif9h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/90366d00-db31-4490-9021-dda180a96680/86299679728.pdf
    • https://uploads.strikinglycdn.com/files/90bc3c95-caa7-4ef8-84ce-822dcda0155b/83879044006.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_93ae51ecdd8544538c02aabc639bff02.pdf?index=true
    • https://uploads.strikinglycdn.com/files/80af38a3-042c-4d4b-847b-f933a645623f/43027257897.pdf
    • http://zivosefim.rf.gd/macbeth_study_guide_act_1_scene_2.pdf
    • https://uploads.strikinglycdn.com/files/909d32f0-0faf-4955-abaa-46f3b8f1c836/27199804430.pdf
    • https://uploads.strikinglycdn.com/files/3a97ac91-2cae-47af-93b0-7637a7920dc7/skyscan_atomic_clock_transmitter_not_working.pdf
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_d215bb73d71040edb5e3aba1b5734b1a.pdf?index=true
    • http://kavonuloruzofeb.rf.gd/foguzetijonavox.pdf
    • http://mezezix.rf.gd/37448277051.pdf
    • http://bibalaluroxute.epizy.com/36568533393.pdf
    • https://uploads.strikinglycdn.com/files/47d6440d-99e2-49f2-a305-8079ce668ca7/nasarorotaworokefowiguwu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cc.bin
bdacc79e441507e8b7eaa6a64a1050eedcde7cbe47aa63f688b2a64178c625fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 5476 bytes
font_01_sfnt_off00010579.bin
48e9e07ab2d1902403196e9b7591e186f85c117aa86c489cafc5286ec5b7eff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 10660 bytes

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