Malicious PDF — malware analysis report

Static analysis result for SHA-256 a734f0595b53b824…

MALICIOUS

PDF

88.5 KB Created: 2021-03-13 22:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3b305ef3e00032abb01d194ca23e2184 SHA-1: a48e305d5e3f73cf272f1e716c45b324c82d33bf SHA-256: a734f0595b53b824ad421db70a23e743089dd1d796bc3244d315641b13994f55
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to contain keywords related to popular consumer electronics, suggesting a lure for phishing or malware delivery. The presence of external URIs and link farm heuristics further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=ps4+apple+tv PDF link annotation
    • http://kolagozisil.mywebcommunity.org/26497592447.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/heigvPb/51875311381.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/xivaredoge.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/how_much_does_staples_charge_for_shredding_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/gjjhMjd/big_blue_marble_academy_augusta_ga_reviews.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/74982513070.pdfIn PDF document text
    • https://cdn.sqhk.co/vefobinibe/g4w9KSa/arash_broken_angel_song_video.pdfIn PDF document text
    • http://vamolufu.getenjoyment.net/august_month_current_affairs_2020_in_tamil.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/grade_2_math_olympiad_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nixomirorubu.myartsonline.com/32255763934.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/conditional_of_multivariate_normal_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/henry_cavendish_school_uniform.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/ms_dos_batch_file_programming.pdfIn PDF document text
    • http://vorinemoxolupip.rf.gd/como_armar_un_bosquejo_biblico.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/why_is_my_whirlpool_refrigerator_not_cooling.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/senior_software_development_engineer_salary_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/punctuation_worksheets_free_printable.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/37774795824.pdfIn PDF document text
    • http://purewowesajumu.myartsonline.com/element_flat_screen_tv_will_not_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/ego_lawn_mower_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 4388 bytes
SHA-256: 761aa290296a1ff3f401f522f4d568e787c7ad792c115b5c0a8bd23e85daf0e6
font_01_sfnt_off00011f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F97 11636 bytes
SHA-256: 3a6aa053889c0a0e11d72c35938d24497ba7ab9cb77f9bbba43141a5bdf158c0
font_02_sfnt_off00014713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14713 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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