Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb849acbe0b79288…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 02:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7091ef6b4d4f6d9941f7401b07835a6a SHA-1: d27f8dba9df1a869d5d6589afb7016fb97f10762 SHA-256: fb849acbe0b79288d794e1d803d390bbc5de1776cba507ef32ea2521e6abba65
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain ('dugedepap.ru') and another identified as part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://dugedepap.ru/strik?utm_term=how+to+use+maytag+bravos+xl+washer PDF link annotation
    • http://mosquito.codes/autocad_mep_2016_user_guide46vk1.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/P4Mjjgg/infocus_software_update_tool_free.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/3287816182.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/6579641599.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/gcijYJO/41162637443.pdfIn PDF document text
    • http://jifanavigizan.iblogger.org/tikepegufesup.pdfIn PDF document text
    • http://voxazeveli.22web.org/leveling_guide_toram_online_2019.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/some_interesting_speech_topics_for_students.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/kiaSgcD/roblox_god_simulator_twitter_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/WGkhhei/65647723525.pdfIn PDF document text
    • http://a1metromovers.com/hidden_oracle_seriesoxlsd.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/pdf_preview_handler_error.pdfIn PDF document text
    • http://dashcamtopbest.com/31145070558dsggz.pdfIn PDF document text
    • http://senteber.site/choices_stories_you_play_pc_mod1tqek.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
    • https://s3.amazonaws.com/penale/how_to_connect_stealth_cam_to_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/gta_sa_copland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5441078a-799a-4d53-bd80-547cef740331/how_to_design_a_dd_one_shot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e914c8e-d4ad-420d-9bf2-9db26cc33f77/how_much_time_it_takes_to_learn_intraday_trading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7258d3e4-e535-4490-94c1-c3a05653bf8d/resumen_del_libro_diario_de_greg_14.pdfIn PDF document text
    • http://desejole.myartsonline.com/22340660415.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/graphic_design_portfolio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/11956862013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c354aa58-9cd4-466c-a941-cbc5c3739ecb/mijuxemagepolofewunav.pdfIn PDF document text
    • http://gapusamini.rf.gd/sokedutezaboxedogizijenem.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/math_questions_and_answers_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbf0b40-bd50-4696-ba46-36e357bd9cb9/90752811540.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_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 5248 bytes
SHA-256: 140bdcaa01ab39b3b58fc188914766ad176ef8332ef9aeb142bacb3ec9c816cf
font_01_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 11092 bytes
SHA-256: 2dd7e312b19310eb81d8a43c0f9fe4695a411d89b67e25fa20cafb3a5326cfc9
font_02_sfnt_off00011f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F94 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361