Malicious PDF — malware analysis report

Static analysis result for SHA-256 050ccfbf87759411…

MALICIOUS

PDF

78.9 KB Created: 2021-05-11 20:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29af550d8ece773c3bb1bc3a0648f15a SHA-1: a11f1570d09ff5736c2473cd3abed066d2c4f943 SHA-256: 050ccfbf87759411f85ce243821d8cd92ec2206664e95628b0e28c5d6de29390
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The 'SE_CLICKFIX' heuristic suggests the document attempts social engineering by instructing the user to press Win+R or paste a command into a terminal, likely to bypass macro restrictions and execute a malicious payload. The embedded URL 'https://nipisod.ru/strik?utm_term=grammar+english+corrector+free' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://nipisod.ru/strik?utm_term=grammar+english+corrector+free
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/sutomoweri-durerijidorufut.pdf
    • https://cdn.sqhk.co/fifapupifig/gijhqhf/yellowstone_season_2_episode_1_cast.pdf
    • https://cdn.sqhk.co/tategupet/hhhgfjd/54646604998.pdf
    • http://gudutisiluzew.mypressonline.com/zofalovufaja.pdf
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/rukapabedakakebin.pdf
    • https://bofunakepubosux.weebly.com/uploads/1/3/4/3/134371141/48940f4.pdf
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/kuragu.pdf
    • http://pigalimiru.medianewsonline.com/47548776109.pdf
    • https://cdn.sqhk.co/vutexexukus/joEhcgg/67172924648.pdf
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/1928546.pdf
    • http://ratixopawem.mypressonline.com/materi_deret_aritmatika_dan_geometri.pdf
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/xupazijetik_dilisu_moripabinut_wupik.pdf
    • https://nusemidokiz.weebly.com/uploads/1/3/5/3/135395372/zezaw-radafib.pdf
    • http://zaxiluxedexu.getenjoyment.net/adobe_premiere_pro_cs6_tools_tutorial.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f55c09b1-76e7-46b5-a951-d371a5da9090/hot_water_heater_pilot_light_doesnt_stay_lit.pdf
    • http://vawerudarasikow.myartsonline.com/rubisafej.pdf
    • http://rivenoke.onlinewebshop.net/adding_fractions_with_the_same_denominator_worksheet.pdf
    • http://wifofevowogak.onlinewebshop.net/marketing_campaign_plan.pdf
    • https://uploads.strikinglycdn.com/files/cf1710e5-70d9-49f3-a9c7-09011264a833/2005_dodge_ram_1500_hemi_transmission_problems.pdf
    • https://uploads.strikinglycdn.com/files/493432aa-08da-438c-a533-7f03b63c112a/casio_w-800h_watch_strap.pdf
    • http://futakanawus.onlinewebshop.net/taseroxepo.pdf
    • http://zupitatip.atwebpages.com/kitokaroxu.pdf
    • https://uploads.strikinglycdn.com/files/78bbaf85-e3d0-489e-9bb0-6cd1b419d677/gajudusogiwarefudazuruji.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_off0000fa2a.bin
5c6fcb2a7fb3d127a6db3e203415f53dc5499d55e84fc39ebb8c871f02b46a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 5324 bytes
font_01_sfnt_off00010c1f.bin
98c6b1a4f12357b7da6368b7ee1c3f7869f97a5ed9a678824466952c44cf6f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 10084 bytes

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