Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e04ae208194002…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 05:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8790bb0bdc86c56b969935355d8a8368 SHA-1: 41524a45837ebe183f5fa44ce5792adf5f19bc03 SHA-256: 29e04ae20819400271960be6baf910c614fb2eff854f588893fa8ba018d9f374
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest 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 content.

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 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://kuzutuzo.ru/wix?keyword=thermometer+clipart+transparent PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5ff3e1880903e.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/xowed-zapoxaxotaja.pdfIn PDF document text
    • http://plusstore.pro/android_tv_app_launcher_builderlb2ww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_5fe8deefc9453.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/i3henrf/100_years_love_with_a_vampire_new_song.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/ifjfih6/can_you_escape_island_level_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_601f2070aba7f.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/kamumivuxamala-zezos-wujani.pdfIn PDF document text
    • https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/jodituluzaxinuw.pdfIn PDF document text
    • http://creditscorehelp.info/bibiliya_yacu_apks3xaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fce0b660a8fe.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/zK4hdpU/when_will_hair_salons_open_in_fresno_county.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/haidgjX/buzz_lightyear_space_ranger_toy_story.pdfIn PDF document text
    • http://nat-fru.space/the_book_of_hygge_the_danish_art_of_living_welldr68v.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ikVFii9/steam_games_on_sale_for_1_dollar.pdfIn PDF document text
    • https://bazajiwudimikot.weebly.com/uploads/1/3/4/3/134344454/3992505.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/7041821.pdfIn PDF document text
    • https://riwivuzis.weebly.com/uploads/1/3/4/2/134265818/zevuta-mavuzezemulofo-pitajuguja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_601f1b37f34d6.pdfIn PDF document text
    • http://ubzvp.com/hoover_windtunnel_3_belt_problemsp8kov.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/pusasiguzejor.pdfIn PDF document text
    • http://o-karte-kopilka.com/gerarumbpqe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5ffcac173ccea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5124 bytes
SHA-256: 5a76ea3549dba5c1d35561b3bfa7e841e0e09abcced1eb2a66c160d838398476
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 9432 bytes
SHA-256: bcebca80fc33a23e6f91daa5c6702c1d1923784385b81c15b8571dd3a600f43b

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