Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6468a217f462d6e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-11 23:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cdac4d1e983b012830aa0ed9c896aedd SHA-1: e0c4f9f23c3f76bfc3d4471fd04bf2dc7f02eac1 SHA-256: d6468a217f462d6e9e67ce079fa64396f2fe455b3b6094e65c617bbeaf4d99ae
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/award?keyword=team+effectiveness+definition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416798/normal_5fe4d28eed11e.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/l_anatomie_de_l_homme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffbb341f3aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_601e2cba8181f.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/windows_network_operating_systems_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_6002e8ccd1b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_5fe9309c0445b.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/50421715988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_f6235c6eb5384d36b12a81aaeb2f1824.pdf?index=trueIn PDF document text
    • http://tizexazebubo.atwebpages.com/39505847832.pdfIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_e20e86aa72014ffd975450f2d1f2d071.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_a12cc5adf7bf4dccbfd77536f11539dd.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_16d7c94a6f6840bbb8f822c3e1925727.pdf?index=trueIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_9b1c2ba552f244f6b6833959e188d198.pdf?index=trueIn PDF document text
    • http://vewawisu.onlinewebshop.net/zoxez.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_f6bdc4c47aa940f99a98a7415ea76d0a.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_8c87c568c8144e0ba69183b3efd5dc1a.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_2cd264f04e5f44b284aeb03eac946193.pdf?index=trueIn PDF document text
    • http://vefugiw.epizy.com/boss_fs-6_manual_espaol.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/burepowixisixu.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_57d17e21a1f44feb994d5b6e2c064cb0.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_db06dc434fb445dab2090642f8cc76e4.pdf?index=trueIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_ce64fb4e77cc4668807c725f84281867.pdf?index=trueIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_355376d19d9b4a55a26243715e578941.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_3029c113a3b142f39b161072c5a53ef8.pdf?index=trueIn PDF document text
    • http://vedukewopaw.rf.gd/brothers_telugu_songs_doregama.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_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 5184 bytes
SHA-256: d861d0004e454a944d98468ab7e50d2501616557fc268af04cc4913fda54601f
font_01_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 10624 bytes
SHA-256: d2924e866c4601a5f8528344463c34e8d87e548cf05bd4ca566d4d0041d8f833

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