Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ce966e7687eb2a…

MALICIOUS

PDF

86.9 KB Created: 2021-03-11 10:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f340719c9ea201f7c52c212212e48bb7 SHA-1: da1d1a15f15dbc5e60810c584550a579ac3d18c4 SHA-256: 50ce966e7687eb2a7d6d4c97c6d4e445b7ced21521ab8a95b0490192a1c0ce4f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=bsl+shaders+1.+12 PDF link annotation
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/5946666.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/career_survey_for_high_school_students.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/19354186517.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/is_there_a_new_fifty_shades_darker_coming_out.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/3ZshbjE/dhoom_machale_dhoom_1_hd_video_song_download.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/92249368529.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/Yjhigha/detusuroke.pdfIn PDF document text
    • https://kukasoxijosip.weebly.com/uploads/1/3/4/4/134431535/1df4e.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/jdujbgf/48483697002.pdfIn PDF document text
    • https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/xegimawevavifomu.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/rodiwulatolom.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/are_oil_filled_space_heaters_efficient.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/datijuzig.pdfIn PDF document text
    • http://fatunatet.getenjoyment.net/dugekaxotugimesazaguw.pdfIn PDF document text
    • http://larebalin.mypressonline.com/is_cyberpunk_2077_ps5_60fps.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/tudikakuri.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/e53ffd6ef9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/punjabi_alphabet_chart_with_hindi.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/microbial_genetics_mcq.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/banisete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdfcbe64-f07d-44d1-b582-4ce755100a4c/casio_2747_aw-81_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c354ca5f-6fbf-40d7-9f6a-dc94a80703cb/shmuel_boy_in_the_striped_pyjamas_real_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a859768f-596d-474e-8904-cf02b3a01ee0/vodaxopamosewemexekor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c1760c-8c69-452a-9f16-8a0585796c95/the_river_garth_brooks_guitar_chords.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/evenflo_nurture_car_seat_strap_adjustment.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/how_to_level_lockpicking_rogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b4f8d5-fcd7-4723-9f98-def967e71e33/torakavun.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/lokenugugerutokafinap.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_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 5176 bytes
SHA-256: 95c826b9d982b8fb55d17dd418270e25cd4835151cb422828597e2252779bb8f
font_01_sfnt_off0001200a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 14640 bytes
SHA-256: c7785d443c3760dda98d47e3d8ed1900d2a71c5ff1d3b5b4087f16ea991b991d