Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aac2819a049ded7…

MALICIOUS

PDF

82.2 KB Created: 2021-04-01 03:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4f72c3d4dae57541351ff592818b12ef SHA-1: 5ee3cde77385aa71f1310e72b210942f2fc89301 SHA-256: 1aac2819a049ded7984468b4e37aab4cb6f207086a8638e86377c9b9e8c3f149
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting domains, suggesting a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://vilenefex.ru/wix?keyword=yugioh+field+spell+for+dragons PDF link annotation
    • http://lnstagramcopyrightmanagement.com/what_are_the_best_strength_training_exercises_for_runnersi0gzq.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/Bjdiaol/rapul.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gvfgehd/68792604280.pdfIn PDF document text
    • http://businesslinecenter.com/they_say_i_say_chapter_5_summarygdj9f.pdfIn PDF document text
    • https://vowobonu.weebly.com/uploads/1/3/4/8/134853209/sagajelifejo_gimaweganimebuv_dojuzonijaxo_lazotexetulu.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/ropevaxobefubuk_rifakamevamir_xuviweluj_rozomo.pdfIn PDF document text
    • https://jemaveroker.weebly.com/uploads/1/3/5/3/135391058/suzizaburatujab.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/49bd9c824e2.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/27a6aec.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/roller_conveyor.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/ncert_mathematics_book_for_class_10.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/ji6DXtX/58066811901.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/64991702221.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/meduputaka.pdfIn PDF document text
    • http://ketrovk.xyz/free_zombie_survival_games_multiplayer22v35.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/zatasipezeg/auschwitz_tour_guide_english.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/spoken_english_tamil.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/sanalenutowifodagukeri.pdfIn PDF document text
    • http://fepusum.onlinewebshop.net/aditya_hridaya_stotra_in_english.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/87935233347.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/convert_to_word_free_download_cnet.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/ferewerebilu.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_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 5264 bytes
SHA-256: bcd3dacbde62c0a6be31d9697370220c0bb969f146bd6bba1ad5d583b4658614
font_01_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 10892 bytes
SHA-256: 8b3488f498c43619eaa6cb8794f43a18b3e10d169b8953502f4bd5f8bf94b285

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