Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fddefa229f6181…

MALICIOUS

PDF

69.4 KB Created: 2021-05-31 08:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d263636dddd7cfb35d19548ac0ac0159 SHA-1: dac0c65f404dfd9abd5243ad3b3d6dac5a73c736 SHA-256: 22fddefa229f6181fdc33ce3b72e950f0d0a89f7fa835a09220f29fc2baa745f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of embedded external links, suggesting a link farm or phishing attempt. The document body is heavily obfuscated and unreadable, but the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/123?utm_term=bahubali+movie+audio+songs++in+tamil
    • https://vabemeraronoj.weebly.com/uploads/1/3/1/4/131452983/3355761.pdf
    • https://cdn-cms.f-static.net/uploads/4465128/normal_60301c0ea0532.pdf
    • https://cdn-cms.f-static.net/uploads/4407100/normal_600fa738e02df.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/xirapakusasutus.pdf
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/4732528.pdf
    • https://bodizolisasutez.weebly.com/uploads/1/3/1/8/131871954/7a6a90d559e.pdf
    • https://cdn-cms.f-static.net/uploads/4424349/normal_606cf03177b07.pdf
    • https://cdn-cms.f-static.net/uploads/4483089/normal_60292eb661467.pdf
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/mepotijofimuviwino.pdf
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/4221072.pdf
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff9e21a8578d.pdf
    • https://ruxamaref.weebly.com/uploads/1/3/4/7/134749336/d785dbd5.pdf
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/c3b6cf41810b256.pdf
    • https://cdn-cms.f-static.net/uploads/4450044/normal_606417c60703c.pdf
    • https://zuxaminuxux.weebly.com/uploads/1/3/4/6/134652083/3238295.pdf
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5fe7244910a3a.pdf
    • https://kuwavumiwedow.weebly.com/uploads/1/3/4/6/134673312/2795508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0b4cd3e8-a7d9-46c8-aa2d-cb1f0c140630/flammable_storage_cabinet_ventilation_requirements.pdf
    • https://uploads.strikinglycdn.com/files/429e980b-3375-4789-9c28-9374c980597c/88480690790.pdf
    • https://uploads.strikinglycdn.com/files/fbf88a13-46f9-4c86-b6bb-b459daa74259/star_wars_the_rise_of_skywalker_box_office_reddit.pdf
    • https://uploads.strikinglycdn.com/files/30d39365-0e27-468e-9c12-ffb1d50b6c1b/12796275657.pdf
    • https://uploads.strikinglycdn.com/files/996a3712-98c8-4e7e-892f-4b54c2d405e3/feta_pasta_recipe_tiktok.pdf
    • https://uploads.strikinglycdn.com/files/4d0e2886-22d3-4081-b489-40273d658ed7/gilewezuxemikaniwuxikegu.pdf
    • https://uploads.strikinglycdn.com/files/2e8d618e-cb4b-4df5-92bc-4ff9f1b302dd/afterglow_ps3_controller.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_off0000d341.bin
ed0d1eb59eed63c78474768b81b16fdcd441c4f88eaa53eb4c8e76d694a462f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 5392 bytes
font_01_sfnt_off0000e576.bin
d9b3ac88296c5e9631e66887fe02c0f36ecd049414f5a823c055151d91b3c7f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 10052 bytes