Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a1acfd78f042af…

MALICIOUS

PDF

70.9 KB Created: 2021-03-15 07:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6cc043bf0ce3f9a5bdc70b2375edb0a9 SHA-1: 2a4998d39e9a628364b86c51c433292cbeb7fc0c SHA-256: a8a1acfd78f042afe08f9ee9bee90e875aba822608e60a4bee89127c27b4a93c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'veganism' and includes metadata from wkhtmltopdf, indicating it was likely generated programmatically to host links. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/award?keyword=ensayo+del+veganismo+pdf PDF link annotation
    • http://fubikopelemom.mypressonline.com/lirr_schedule_babylon_line.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/2NkL6Cz/gunship_strike_game_hack_apk_download.pdfIn PDF document text
    • http://yazansoft.com/goliner3syz.pdfIn PDF document text
    • http://adanakebap.org/36260073717y1v5.pdfIn PDF document text
    • https://mutixuvuv.weebly.com/uploads/1/3/4/6/134665255/lanunitelubu_xoruxemoxog_fojaxugob.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/bZKRide/nuronejoxanobezeratepu.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/5572919568.pdfIn PDF document text
    • https://wanagewuzedu.weebly.com/uploads/1/3/1/3/131383352/fojikonaneve.pdfIn PDF document text
    • https://wanuzixa.weebly.com/uploads/1/3/1/4/131482886/c0f93619ed321a.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/1176858.pdfIn PDF document text
    • http://my-favshop.online/nse_historical_data_in_csv_formatf5ppn.pdfIn PDF document text
    • https://xoxatujetila.weebly.com/uploads/1/3/0/7/130775098/d6ed2888ca.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/hdjfEZi/15990531293.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/28034492294.pdfIn PDF document text
    • https://puwixono.weebly.com/uploads/1/3/5/9/135957765/wibujowapokaw.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/2493fb6.pdfIn PDF document text
    • http://garant-ritual.online/pewdiepie_legend_of_the_brofist_android_apkrj3s0.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/fozomujilebekejobodo.pdfIn PDF document text
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/adc4e9654.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/13b9f29b19.pdfIn PDF document text
    • http://sbrf.link/multiplayer_shooting_games_pc_onlineiutm5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonesolipekivin.rf.gd/losor.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/60084156651.pdfIn PDF document text
    • http://xinirujoki.epizy.com/65688120507.pdfIn PDF document text
    • http://zilomit.epizy.com/the_rules_of_attraction_full_movie_free_download.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/29741437638.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/9698827915.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_off0000d4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F4 5384 bytes
SHA-256: 26982f3a9566d55a6280dd5d1a88422c6ff7fc5af78cbb85dd8a4797541375c2
font_01_sfnt_off0000e74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74E 11172 bytes
SHA-256: 8850a3047f4fbd875e32a946084f48116158969e7d67c6df9a93f9d56a0a002a