Malicious PDF — malware analysis report

Static analysis result for SHA-256 1872c3401d0d6536…

MALICIOUS

PDF

76.9 KB Created: 2021-03-26 08:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8ccbd5b7f49c6caf5fed52e5fb0d2857 SHA-1: 6b7ae2391ecd13f0d50a787b0a0a183132f53878 SHA-256: 1872c3401d0d65363901eecf4ea428d733643d75e3b91474ff5c465edc81e646
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'leonvi.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or redirect users to malicious content.

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://leonvi.ru/aws?utm_term=what+makes+you+a+primary+caregiver PDF link annotation
    • https://cdn.sqhk.co/sirejeforox/b29icii/zapavukefowuzupixarotu.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/Zjhhbjh/2763122691.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/ha672hd/hidden_city_hidden_object_adventure_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/fjjMBPa/kigazotesebigizowe.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/hedqie9/throne_of_blood_castle.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/ihijDTN/mega_ramp_impossible_car_stunts_gt_car_race.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/dCZdhgL/touch_the_wall_game_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_60270d97bd2d1.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/gekhfgj/tisixubolamif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_605a7fae91c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_6034fefbb761b.pdfIn PDF document text
    • https://cdn.sqhk.co/kefofepobam/id7QhdK/xopaluvajuxofatovevuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/TifMiiU/52554969330.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/EhdDxgj/switch_scanner_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/jaNXggl/driveon._net_nyropsgade_6_1602_kobenhavn_v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_6037ab115702b.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/Djb7che/formula_racer_2012_game_online_play_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459640/normal_604e396122570.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/hdjafjc/flip_or_flop_stars_married.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/fujadabez/wudibepamenoru.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/linedance_stepsheet_day_of_the_dead.pdfIn PDF document text
    • https://medlineplus.gov/caregivers.htmlIn 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_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 5552 bytes
SHA-256: 75ac6fcdf6c75b066cf9abeef1776ec74f96643637ea4a640a2534d362df68a5
font_01_sfnt_off00010113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 10936 bytes
SHA-256: 9afe461e1c1aa8e32ab6ba2e3ad2a85eaf66fabc5a347ffd289124bc04ce4831

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