Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed8394d8426435b…

MALICIOUS

PDF

72.8 KB Created: 2021-05-02 02:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0a88d8db40c94fc455d033dee341d7c7 SHA-1: 293b2f684ba912750fcd5d5d8067171406c5b6b7 SHA-256: 3ed8394d8426435bf5a8d6fa92e5854bc948fdf532f3b408a4e9f7a3bf222a46
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('dugedepap.ru') that is likely used for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=definicion+de+manual+de+calidad+segun+autores PDF link annotation
    • https://cdn.sqhk.co/karapenakozi/jibUIhe/the_maze_runner_movies_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/madeparev/jf1haie/emirates_id_card_form.pdfIn PDF document text
    • http://nutapobo.iblogger.org/windsor_smith_white_platform_shoes.pdfIn PDF document text
    • http://pafunote.iblogger.org/20551302196.pdfIn PDF document text
    • http://fodibuj.scienceontheweb.net/pojabajorovukujewiwu.pdfIn PDF document text
    • http://vetapako.22web.org/vadidekupopidixavup.pdfIn PDF document text
    • http://kibesamifi.getenjoyment.net/fojopikiwigofovusegojew.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/12431482280.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/ihBzXeX/duvazol.pdfIn PDF document text
    • https://cdn.sqhk.co/wubejiwixu/jcPKigi/suraj_bhai_name_ringtone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/jdujibo/vitacost_20_off_food_coupon.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/crying_alone_piano.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://gugitetororu.rf.gd/how_to_connect_my_hp_deskjet_2630_printer_to_wifi.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/fanevunugup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370e5e25-427a-4587-b474-72f32b24f7f5/how_would_you_describe_tequila_sunrise_cocktail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba53e4e7-1929-4823-9349-4d342bc5b84e/how_long_do_you_cook_a_half_ham_in_the_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848916bf-61e8-457e-8537-589a7973d5fc/wosokekifigaditorumal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c6fdda-c5b3-4531-83ac-5fde5422abbf/aprender_ingles_rapido_y_facil_leccion_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc981dc-7696-4c69-8687-fdeb8625faee/26119910860.pdfIn PDF document text
    • http://kilobawul.rf.gd/battle_of_the_bastards_script.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/xobemajulonububi.pdfIn PDF document text
    • http://tobizexajivuvob.epizy.com/dugazimarajupuvajokip.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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 5224 bytes
SHA-256: 1a6fbf25b1076bef4a7efef7b52030187748e0282f63c75a434a57cd2e179668
font_01_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 11128 bytes
SHA-256: c7123bc1be9197366d4952682cc877f20fd725b028aaf550622034b8bbd56363
font_02_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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