Malicious PDF — malware analysis report

Static analysis result for SHA-256 036a5307570eb940…

MALICIOUS

PDF

82.4 KB Created: 2021-03-21 12:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd993012f2a3e158c6b3a238e2b06ab6 SHA-1: 218724a46e1b01072a06939b33ed9f378c7b961c SHA-256: 036a5307570eb940bd5780fe69a3f5a93c9c0ab04d8bacec08cf23b2f5dd2707
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, including one to 'soxebez.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

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/wix?keyword=ravpower+rp-wd03+manual+espa%25C3%25B1ol
    • https://cdn-cms.f-static.net/uploads/4461483/normal_5fd894c8ec7c3.pdf
    • http://selolaz.66ghz.com/xetomakuvonesegepolalajaw.pdf
    • https://cdn-cms.f-static.net/uploads/4409614/normal_6009b5a8ec223.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://47f996fd-8e57-4de1-b9ea-1bffeedbadfe.filesusr.com/ugd/1b0481_4bef68b6c92f4d168464ba67f2f87d53.pdf?index=true
    • http://wativexapu.epizy.com/divegifanineluwubotejup.pdf
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_3e73dacd55a94f9f95e878be37aebdd3.pdf?index=true
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_18c8e4eaac1c48da89b4cb5af59e9a66.pdf?index=true
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_3ee285bf9adb4dee891d5f46c4a31a63.pdf?index=true
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_c46f7bee1599429da288b2fbf87379a6.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_71ced8dcd08f489aa34ad3ad056030b5.pdf?index=true
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_002c6b03e0314cb2b7ceb1ce8b91a66a.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_a9b9225baebf450c8312caab7b65b9f1.pdf?index=true
    • http://tawajopawizapa.rf.gd/charitable_donation_receipt_letter_template.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_1a00fcdc577d4ea992e74ec838401feb.pdf?index=true
    • https://423b1922-3b22-4770-a53c-9b76cf3b1ee3.filesusr.com/ugd/1b0481_1194a9a109574f44b69a3f398d0e04df.pdf?index=true
    • http://setuxar.rf.gd/birixegubafef.pdf
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_d4fa0e8670a6454594db825e9ecead16.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_off00010146.bin
f29a3dec924a2f13747b63b44b75f75c4b11ded2145c4bdf42a565fcc75c0aa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 5812 bytes
font_01_sfnt_off000114d5.bin
23e1ed1a21acafdb685c4aeb2bf73fe922ce4358c19a18255f6c874222529167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D5 11216 bytes

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