Malicious PDF — malware analysis report

Static analysis result for SHA-256 0130c0bde170fbca…

MALICIOUS

PDF

76.0 KB Created: 2021-04-04 12:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 50cbab931ec45d08c4513a929c61678c SHA-1: 5823b271d8ce649aff492015b9210bd07a6db146 SHA-256: 0130c0bde170fbca2fd0beec68382dd8fb0cfa110805011838e4b9ef37029d3f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high concentration on disposable hosting and link farms, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to malicious content, likely leveraging PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=trigonometry+cho+sha+cao PDF link annotation
    • https://cdn.sqhk.co/dodazija/D3Xghhj/world_market_30_off_furniture_coupon.pdfIn PDF document text
    • http://limecash.xyz/foldable_leaflet_template_publisher0i7yn.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/gcDfxih/tejezetuva.pdfIn PDF document text
    • http://design-kvartira.info/wugekudarefe3fz2r.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/fWVhgE6/download_game_souzasim_drag_race_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/TiaiaqV/break_the_prison_apk_home.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/80529562928.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/wordly_wise_3000_book_3_lesson_6p6cyu.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/vOfjanT/hybrid_animals_spore_evolution_games_lansing.pdfIn PDF document text
    • http://pakekoramiduwin.getenjoyment.net/dieta_cetogenica_30_dias.pdfIn PDF document text
    • http://phrensy.co/zora_neale_hurston_their_eyes_were_watching_god_plotuhe8b.pdfIn PDF document text
    • http://zuvels.xyz/focusrite_saffire_pro_24_dsp_buy2b5g9.pdfIn PDF document text
    • https://cdn.sqhk.co/nupopobax/wgjwijk/slot_word_meaning_in_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/Dif9CtH/ufo_hunters_dvd.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/preguntas_ceneval_medicina.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/buponuwebi/are_bamboo_sheets_good_for_night_sweats.pdfIn PDF document text
    • http://virirunabeso.rf.gd/bovozaxowonakipifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/54880104346.pdfIn PDF document text
    • http://toxifiv.myartsonline.com/camera_angles_in_filmmaking.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/what_is_the_central_idea_of_the_gift_of_magi.pdfIn PDF document text
    • http://sikofus.epizy.com/avery_5160_label_template_for_mac.pdfIn PDF document text
    • http://bodupizul.epizy.com/95897429726.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/10611322720.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/32621470583.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_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 5232 bytes
SHA-256: 9f03c0c2fefa8eeedb0ae310956929573e43778df293646da216fc2cf0530415
font_01_sfnt_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 11556 bytes
SHA-256: db1c8858ee3bdfe7279a92127d79d370818017a66ca5ed299158a3b71b7fe838

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