Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e351ba8e06b6433…

MALICIOUS

PDF

75.1 KB Created: 2021-05-23 02:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5cb6a9d7b6fba699555b389834aa902f SHA-1: 049ed58439b9bffdf34017c5ab17f71d4200a806 SHA-256: 1e351ba8e06b6433e6fbf6681a2dabca348e78df0f3b22156f95519bf4a62a51
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'fokemale.ru'. The document body, though heavily obfuscated, appears to be a lure related to a common technical support query. The presence of a large number of external links, including a link farm heuristic, suggests an attempt to distribute malicious content or engage in SEO manipulation for phishing purposes. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=why+is+my+bt+smart+hub+flashing+purple PDF link annotation
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/tojetekukufa.pdfIn PDF document text
    • https://kowulenube.weebly.com/uploads/1/3/2/7/132740682/zamuzow.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/0c020811bd4ea.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/580a7923fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fec501ad3214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5ff4e05b3fb23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_604e20c4b717e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_601be4560de2d.pdfIn PDF document text
    • https://figedojopijobe.weebly.com/uploads/1/3/4/7/134769561/jexumaladirodov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lerezazo/how_to_work_out_the_volume_of_a_cuboid_net.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/gilimexuvujitamurutup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6085b8-c379-4219-b90e-5a2263c2f083/monster_in_law_movie_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xenilononafi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/attention_economy.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/what_are_the_4_market_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fcfbeb-ff76-4de2-8b4c-76f568304d7a/live_my_life_to_the_fullest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325af84d-8d43-4ad7-aa66-90349be290e0/dugadasenupagav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4717cb-27d6-4f0f-864d-8547c3d6a4f6/how_to_practice_earthing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460983b6-fc53-4cf4-81c6-661aa6ff54cd/rifilotubugupirer.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/samsung_front_loader_washer_error_code_3e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fad7a24-a9e4-458a-9009-155d314d1a99/fenelaxegikinudos.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_off0000e6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 5568 bytes
SHA-256: c71769d0a4904ccda61993bd7e38dec0438656389aeb13e5a3efaef7fd8b969a
font_01_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 10788 bytes
SHA-256: de4b902bf60c4a6a1624fbe9cf8611a0a39facbc2dde72e8c1accffedae6180d

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