Malicious PDF — malware analysis report

Static analysis result for SHA-256 703335340506a170…

MALICIOUS

PDF

88.6 KB Created: 2021-03-29 16:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d6a913c2c746fa4d79965542ea1062f SHA-1: dc84afd4ed8a9d0d9f0733f541a4cd6ebee543ca SHA-256: 703335340506a170666b1f810ac3a39836d6e35eba2615cd20bb7eb635aa8e81
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing campaign, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classifying it as a phishing trojan. The embedded URLs likely lead to further malicious content or phishing pages.

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://soxebez.ru/award?keyword=tecnicas+de+afrontamiento+pdf
    • http://jipujitematane.iblogger.org/dunegavejerozos.pdf
    • https://cdn.sqhk.co/riluvexudeve/iiUbjf9/deligazudugokose.pdf
    • https://cdn.sqhk.co/kurotevu/hhMhbia/radio_sinar_fm_online_free.pdf
    • https://cdn-cms.f-static.net/uploads/4424996/normal_60387e6c0957a.pdf
    • https://cdn-cms.f-static.net/uploads/4386095/normal_6022e84fe91a0.pdf
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/buwetikopabewaxa.pdf
    • https://cdn.sqhk.co/pasivuzuke/QnHkijA/88729252439.pdf
    • https://cdn-cms.f-static.net/uploads/4417138/normal_604ab37c0cf05.pdf
    • https://cdn-cms.f-static.net/uploads/4472206/normal_603a9228b8ec9.pdf
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/tafitarus.pdf
    • https://cdn-cms.f-static.net/uploads/4416790/normal_603285cc4abc3.pdf
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/dugovuzamili-riwufepefo.pdf
    • https://cdn-cms.f-static.net/uploads/4464056/normal_600bec32f2c13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_f97eef6f58b646019f18307c36aaadd3.pdf?index=true
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_e53fb40eb44e42c7b6fe7b6e8fa42101.pdf?index=true
    • http://jutebef.rf.gd/rolazebugopamejiruwezoj.pdf
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_5df4c486a4d84b9f8f73cb5454f5e23b.pdf?index=true
    • 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_off00011e78.bin
e1408b74a5cac6edf71bbc318f19862676ab0e4048c54990fb9ee382a0946a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 5220 bytes
font_01_sfnt_off00013020.bin
54b36351193cf75b026ad15171d3e8606e3c0c02d1236705f1d8a9037bc578fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x13020 11016 bytes