Malicious PDF — malware analysis report

Static analysis result for SHA-256 351e46da35359c12…

MALICIOUS

PDF

68.5 KB Created: 2021-03-28 15:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 674c572d9f24c42a7848eed96661321a SHA-1: 99a99291e967356965b3218dfe376b4c97c0831a SHA-256: 351e46da35359c122c2daacb4b7fb8f11e20a134828d9befd81781e17c24cf40
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one pointing to 'https://golowaki.ru/wix?keyword=elite+tv+apk+2.1', suggesting a lure for potentially unwanted applications. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's purpose is to host many links on disposable domains, likely to attract traffic or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=elite+tv+apk+2.1 PDF link annotation
    • https://gedamalemomomig.weebly.com/uploads/1/3/4/5/134504316/2144392.pdfIn PDF document text
    • https://budovabi.weebly.com/uploads/1/3/4/5/134510119/dukakekoduzeb.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/Y3hapig/echo_voice_recorder_app.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/moluwexap.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/6320874.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/Tmgip0U/hitman_2_silent_assassin_rating.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba89893-eb73-4b57-bac0-e3ede49dec92/4708156623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5857b3f0-59e6-474f-9760-2db8a8afeac7/powewosafonolebedumiriwa.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/2775384591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97736394-9f19-4dd6-ad9d-fd6a8f5f384b/what_to_say_to_someone_who_fears_death.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/new_immunization_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb81b8f9-16b9-4524-a073-a7136fddb939/new_super_mario_bros_2_full_game_free_download_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/52494174796.pdfIn PDF document text
    • http://gavexebalaji.rf.gd/why_does_mcdonalds_use_the_colors_red_and_yellow.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/are_bounce_dryer_sheets_toxic.pdfIn PDF document text
    • http://sisumosunozudot.epizy.com/mid_america_oireachtas_indianapolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85daad42-a48b-49a4-b727-957d0e287808/what_is_the_newest_dresden_files_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/cheeni_kum_full_movie_480p.pdfIn PDF document text
    • http://surowopewol.epizy.com/86584636616.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_off0000cf72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF72 4836 bytes
SHA-256: 3da4eb84cb8aa51cba3328d23318211d41f9928f4e8584b6a7ba1e52f6545077
font_01_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 10696 bytes
SHA-256: deaeb417f118482f3a14ed0ec4375e48b65f27690ca9bbd9e0bc8c98696e92e8

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