Malicious PDF — malware analysis report

Static analysis result for SHA-256 431d46828973d6da…

MALICIOUS

PDF

80.6 KB Created: 2021-04-01 10:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc690a41e5403d9c5dab3cfce6363b92 SHA-1: 6ad93d2fcfb09b852b52ee64087776939366cf2c SHA-256: 431d46828973d6da554ea2d038501c3696554cf6a609344515e34dbc986cd0fb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URL pointing to 'fokemale.ru' suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/award?keyword=amarakosha+english+pdf
    • https://cdn-cms.f-static.net/uploads/4476126/normal_602500b7b848e.pdf
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fda1bfc9bbe3.pdf
    • https://cdn.sqhk.co/vufebevefo/qaRtUjc/top_war_battle_game_level_up_fast.pdf
    • https://cdn.sqhk.co/kosenopelid/ghylhfY/19611297568.pdf
    • https://cdn-cms.f-static.net/uploads/4366660/normal_600a62533ba8c.pdf
    • https://cdn.sqhk.co/dasotipamu/ja0Cnfi/podekibabutitadimutesifu.pdf
    • http://waystep.site/88158275817wa22j.pdf
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fcaacdd5d792.pdf
    • http://fastnoutservice.ru/masters_in_business_analytics_in_usa_without_greer1l7.pdf
    • http://termometr-medikal.site/49332099837bdctj.pdf
    • http://sutonazijusi.iblogger.org/tisenezu.pdf
    • https://cdn-cms.f-static.net/uploads/4496170/normal_6038cc35158a8.pdf
    • https://static.s123-cdn-static.com/uploads/4467027/normal_5fdef7d747fb4.pdf
    • http://iglivesupportteam.com/how_do_i_reset_my_liftmaster_control_panelo7pop.pdf
    • http://helpcenterbusiness.xyz/descargar_controlador_hp_photosmart_c5280_all-in-onejt6rk.pdf
    • http://kabomodom.iblogger.org/calculating_volume_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dopoval.epizy.com/ley_de_ohm_enunciado_ecuacin_y_aplicaciones.pdf
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_de7df641c3914786931180736a0d6b79.pdf?index=true
    • http://nafufejuk.rf.gd/87663569572.pdf
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_a54a3ea051f94f3cb665b5989667394c.pdf?index=true
    • http://wulekugigewipo.epizy.com/aaai_isma_study_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5d.bin
a477138d751319cd7aaafe9bebc17df6733e8034b9051ad6b171e1dc36c20e50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5216 bytes
font_01_sfnt_off000100e4.bin
82422f57264e4c8f4ad9b2bba3a11b9b1561cb1b7281e2c31f9921dc8678dbaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 11228 bytes
font_02_sfnt_off000126e1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 4324 bytes

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