Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a22951de74d42d9…

MALICIOUS

PDF

80.6 KB Created: 2021-03-12 04:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f8510cb4613a798d151dc54a9b9644d1 SHA-1: 95e0f8ab3fe69be9b0bb4369fb952507b0456ed7 SHA-256: 5a22951de74d42d961a11b5cb07ff2f8db478bdee77535963553f83543a1d64d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to 'defensive driving test answers' and 'wkhtmltopdf', suggesting a lure to disguise the malicious links.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=defensive+driving+test+answers+2020+fiji PDF link annotation
    • http://wisitens.online/dozerolakavikolijabzgpb.pdfIn PDF document text
    • http://ulekschool.online/why_is_my_stove_not_clickingozlcu.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/1461811.pdfIn PDF document text
    • http://losinglotterynumbers.com/811019559275ylj1.pdfIn PDF document text
    • https://cdn.sqhk.co/xilobotinisi/jDounYh/zumbla_deluxe_level_353.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/hijyhic/xaxisabevil.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/T4ghxjj/gunship_battle_helicopter_3d_mod_apk_android_1.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/5949510.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/bojixoxo.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/9aa9ac6f3e3.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/6dad3489.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/geKzOuy/shake_the_monkey_tree_hotel.pdfIn PDF document text
    • http://static-start.top/dunia_games_top_up_ff_promo4vhat.pdfIn PDF document text
    • http://opssmall.space/6590720414l1s6x.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/BCaibqM/rotubokinegowimitabitas.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/hcZmggW/alien_shooter_game_apk_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/ehiZYhg/gikinisekojolebevowebuma.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/varolexexus/39960889472.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/activesync_android_email.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/34034209587.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/94899299185.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/android_activity_label_center.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/37650545199.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/20395922607.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/genagojifufevaxakaputur.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 5544 bytes
SHA-256: 27ddedf70c06f1fb4e3e2824c73488a30b5e6e3cac8fcbb3fc41a545c51213c8
font_01_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 10320 bytes
SHA-256: 8fa576d87c2ba728c7545656afe3d31315be86ab95bd3e664812e313d825e54a

Open this report in the interactive analyzer, or submit your own file for analysis.