Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4776d586aa7b5c…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 12:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 790b365345d20e6f960ea5013940a4eb SHA-1: 73bf4202860a66ad7d840dcee43c1badaea17430 SHA-256: cd4776d586aa7b5cc9f132f2ce3d1fc7009eb8029f95e1ada0464cbe211521b1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a search query that acts as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=martin+luther+king+speech+youtube+full
    • http://firstreadersclub.com/cv_template_for_university_teaching_assistant52mop.pdf
    • https://static.s123-cdn-static.com/uploads/4500667/normal_5fe427e27820f.pdf
    • http://shoop-fg.ru/hamilton_beach_flexbrew_replacement_carafe_49983iqrb1.pdf
    • https://cdn.sqhk.co/bofozuto/gpjevEm/56140572989.pdf
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5ff622eea977d.pdf
    • http://gipogup.sportsontheweb.net/64227671977.pdf
    • https://cdn-cms.f-static.net/uploads/4495681/normal_6027cc459b00d.pdf
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6035bfd250d22.pdf
    • https://cdn-cms.f-static.net/uploads/4388060/normal_601061f3a5d8c.pdf
    • https://cdn-cms.f-static.net/uploads/4458394/normal_6017099dbd218.pdf
    • http://artrosil.xyz/58098575113tm65g.pdf
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6027cc0822a0d.pdf
    • https://cdn-cms.f-static.net/uploads/4459621/normal_601b014808892.pdf
    • https://cdn-cms.f-static.net/uploads/4381539/normal_601596b6e4247.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faleferesevo.onlinewebshop.net/96886546465.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_off0000e7b5.bin
62f0d5aab47b6eb603aa3a4ebf62b929f4dfb0fe348eca957229627e0486d778		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 5588 bytes
font_01_sfnt_off0000fac5.bin
54739812173c6daf06a6efd9a92487636f2d564ccc2488402a7ee46981d6b9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 10412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.