Malicious PDF — malware analysis report

Static analysis result for SHA-256 53003d44a2653035…

MALICIOUS

PDF

80.0 KB Created: 2021-02-22 03:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d43790a8e7c87aed6a53fb60e2ce6c59 SHA-1: 783491e44a8591c6453c7e7eafc315ff92957ff9 SHA-256: 53003d44a2653035021a7f3b4b265208e55a3728b2a8e93dac6fcc0555a93c49
136 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious. It presents a fake CAPTCHA, a common lure to trick users into executing embedded content or interacting with malicious links. The embedded URL points to a suspicious domain, likely serving as a distribution point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://jacksth.ru/strik?utm_term=graco+breaze+click+connect+stroller+accessories PDF link annotation
    • http://inostrana.com/how_to_install_cosco_car_seat_forward_facingm7it1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602945bae303f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_601eb1b44c89a.pdfIn PDF document text
    • http://help-mediasupport.com/26194437168p5l3q.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/equation_of_ellipse_worksheetggkvy.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/kawotexulozax/no_root_firewall_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/22317102236.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/makeup_brushes_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/fuwelavedasevedufawikeji.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/futewixuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/kokoronashi_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/zutexanedebesoba.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/maze_runner_death_cure_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/dyson_ball_vacuum_cleaner_casdon.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/aap_se_milkar_acha_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/riselibufexukusemexegine.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 5080 bytes
SHA-256: 6989c07991eea32b3e328a189892b2eee8e2bff6a7a9cfa4654794de833ac8f3
font_01_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 12596 bytes
SHA-256: 123b3cea407b580aa0ccc4c727701997541991b8347625e5c50aa49eb535d29f

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