Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fe1a2dcf14f26c…

MALICIOUS

PDF

66.0 KB Created: 2021-02-22 02:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba6bfc5cd5a93434e4d6436398dee6ae SHA-1: 1627aa75d91da34e79baa04b3c7935aec9b883b9 SHA-256: f4fe1a2dcf14f26c9782ad2edca64defa27f07eefbda254b7be9bc203da0f621
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site, potentially as part of a phishing campaign.

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://leonvi.ru/wix?keyword=bissell+powerforce+helix+parts
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/zosimosoravo.pdf
    • http://new-leggins.site/gleichungen_mit_binomischen_formeln_aufgabenvup81.pdf
    • http://alex-chekalev.com/phantom_of_the_opera_short_story_summaryqpdo4.pdf
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fdd310bf0575.pdf
    • https://cdn-cms.f-static.net/uploads/4385021/normal_60199da851d2e.pdf
    • https://cdn-cms.f-static.net/uploads/4490369/normal_6016229634af6.pdf
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5fc8c1881ef72.pdf
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5fef5bf5c1e18.pdf
    • https://nijusalelazi.weebly.com/uploads/1/3/4/8/134875584/4077851.pdf
    • https://tumulole.weebly.com/uploads/1/3/6/0/136054957/2192423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://matunojusorim.epizy.com/how_to_get_flexible_without_stretching.pdf
    • http://xiluwudikipo.epizy.com/brecon_beacons_national_park_map.pdf
    • http://lapabogi.rf.gd/mainstays_tv_stand_assembly_directions.pdf
    • http://xexelakufakeze.epizy.com/worksheet_playground_equipment.pdf
    • http://tagitefidunun.epizy.com/44223210662.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_off0000c4f7.bin
a1b2cf4efa132fe274e33d405e02b26257089809ed8dbdc953e93afdf6fb3c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F7 5312 bytes
font_01_sfnt_off0000d71f.bin
799c08e0d8835580c2308dd2c4677ab4dc96661a08fc9b38fff628269be522db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 10488 bytes

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