Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ee293de9332821…

MALICIOUS

PDF

72.7 KB Created: 2021-03-08 06:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 145937246adf0bc707136e50c654264b SHA-1: 1c0fadbdc523760c2255f129120d63f23ba99df2 SHA-256: e1ee293de933282179012855c2a84e5f678033134b92017e82ce82a46573719e
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/aws?utm_term=united+colors+of+benetton+jacket+size+chart PDF link annotation
    • http://sberbank.link/2013_dodge_avenger_se_v6_0-60ct3i4.pdfIn PDF document text
    • http://hookup153.space/somugenudovob2jv6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/oijheEA/using_colorchecker_passport_with_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ShjSffF/jonimalarosozukajagapuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5fe2e946c08d9.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/jgFuPnC/34141734745.pdfIn PDF document text
    • http://pogadai.xyz/ressentimento_maria_rita_kehlv7tqk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_6005260639180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448735/normal_5fc654f61e309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_601581939a89d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5fcd64969eee6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff4d55cbc15e.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/jggefhc/nafujolujoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_6018adbea0c7e.pdfIn PDF document text
    • http://dalnoboyi.xyz/setting_hunter_x_core_sprinkler_systemxxhi2.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/bea89798-41c5-4b49-8845-e6f5b4acd480/star_trek_discovery_episodes_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc32b48d-ee0c-4ca5-8612-5fa856b71475/rapodekuzowodigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988d9c03-40ce-4324-97b5-8907bfec4cab/96021834128.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_98f6fbe09dbc47a3b3d952467c2ecc57.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_ea1f11921fd3417e9c3ad62caf2a2f02.pdf?index=trueIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_d72649b8b3a546b2bd31a7069405949f.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_853454ac0855407f8ec93d2e31726746.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_e6f1904e375a4514a5402a36a9ff848c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef704f37-f05d-421e-92e5-2063a447b83c/86821994719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be658bfa-0bf7-4b5b-88b3-2ef0f9b73509/duzopu.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_off0000e07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07A 5432 bytes
SHA-256: be4f36268b56db629ac42107837e5296a03a0b161992a9ba4c22094b06ac992a
font_01_sfnt_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 9924 bytes
SHA-256: 043872e487b4db2f61839525eb3419be563518e7256b5728fb78ad564d3133b2