Malicious PDF — malware analysis report

Static analysis result for SHA-256 152204854f0b2dcf…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 22:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 034b3b17b1eeaf6a51d00439d1d0dff4 SHA-1: 29ee593d667c6c2852dcc519087343959d7c2c04 SHA-256: 152204854f0b2dcf7514ee737701ea7272d0b0428b0c9e535aefff571107ab49
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded links, such as 'https://midufefew.ru/award?keyword=arduino+board+components+pdf', are likely used to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/award?keyword=arduino+board+components+pdf
    • https://cdn.sqhk.co/zaliroded/3jdGgcO/social_trends_browse_trending_by_country.pdf
    • https://cdn.sqhk.co/mowasikuso/hjbhjif/dipibufegu.pdf
    • https://pobizaxorede.weebly.com/uploads/1/3/2/6/132696020/c607d1ee28c6.pdf
    • http://wixosefimaba.scienceontheweb.net/handbook_on_business_process_management_1.pdf
    • http://ridaxaki.mywebcommunity.org/24701925717.pdf
    • https://tafiweva.weebly.com/uploads/1/3/5/9/135993394/kujopidaf.pdf
    • https://cdn.sqhk.co/jogeguzotire/AfcoieE/78062734498.pdf
    • https://cdn.sqhk.co/lilodipu/Ahghche/christian_songs_about_walking_by_faith.pdf
    • https://cdn.sqhk.co/pesasotiro/gHhgggW/dr_driving_game_download_for_pc_windows_8.pdf
    • https://kowizonijate.weebly.com/uploads/1/3/5/9/135991151/7031723.pdf
    • https://cdn.sqhk.co/daposofoxig/igASigw/rapid_racer_ps1_rom.pdf
    • http://vudifabofugejij.medianewsonline.com/castrol_magnatec_stop_start_5w_30_a5.pdf
    • https://cdn.sqhk.co/dinigivo/cAbhUvX/93277290773.pdf
    • https://cdn.sqhk.co/gabixeme/bhecvhf/dragon_lords_3d_strategy_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pojozija.onlinewebshop.net/vavugal.pdf
    • http://movuzawizigevej.myartsonline.com/biodata_for_marriage_file.pdf
    • https://uploads.strikinglycdn.com/files/7c916abb-6fdc-4723-8ca3-cd57858a8e11/kibizupes.pdf
    • http://purezaviwof.myartsonline.com/55502384933.pdf
    • http://teluroluxeterez.myartsonline.com/how_to_register_protection_plan_home_depot.pdf
    • https://uploads.strikinglycdn.com/files/e97e5e7a-d31e-4a26-9c51-959dc90c3a1d/jelevexetamugufuwifolilu.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_off0000efe5.bin
7ccf683e53a877256ccecdb065e4f5347d158562ec58f5a1c5d2031709e5d18a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 5396 bytes
font_01_sfnt_off00010226.bin
6ac59bb2f5b6c11c13a9b79b05116fa1ffe6058e3889857c3a058e54704f3178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 11016 bytes

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