Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abe930fce447e56…

MALICIOUS

PDF

74.6 KB Created: 2021-06-08 15:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e706f2f713c2c092333b2273ddb965 SHA-1: d59405e2001053b68e60e011b272c064da9cde02 SHA-256: 3abe930fce447e56d3ee951bdb0b0f0a683db635918f158a52a3239f0f695f87
126 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a link farm on disposable hosting, with a high ML score and ClamAV detection as Pdf.Phishing.Trojan. The embedded URI points to a URL that appears to be part of a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and heuristics strongly suggest a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://laborke.ru/pbw?utm_term=what+are+the+various+types+of+lines+used+in+civil+engineering+drawing
    • https://cdn-cms.f-static.net/uploads/4444386/normal_5fe73d63ce348.pdf
    • https://cdn-cms.f-static.net/uploads/4386335/normal_60547b7cdc49f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/209e77de-fafe-4e8f-9786-6e8af6fd3125/ruzugi.pdf
    • http://dobifapig.pbworks.com/w/file/fetch/144634026/breve_historia_de_la_literatura_espaola_juan_gonzalez_martinez.pdf
    • http://jizakatum.pbworks.com/f/webimuxalixogovutotipofo.pdf
    • http://gudikijuruf.pbworks.com/w/file/fetch/144448704/nowir.pdf
    • http://mopevot.pbworks.com/w/file/fetch/144821310/what_is_the_message_of_hills_like_white_elephants.pdf
    • http://gabumur.pbworks.com/w/file/fetch/144657198/mslm_grses_filmi_indir_mp4.pdf
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144561651/61152002625.pdf
    • http://zolunegoli.pbworks.com/f/tezigosafifawa.pdf
    • http://pazimonofe.pbworks.com/w/file/fetch/144450819/oh_lord_my_redeemer_sheet_music_free.pdf
    • http://sisagexal.pbworks.com/w/file/fetch/144560691/heat_and_mass_transfer_fundamentals_and_applications_free.pdf
    • https://uploads.strikinglycdn.com/files/69ff04d3-f94b-4267-b39b-71c62df1a451/dixafazem.pdf
    • https://uploads.strikinglycdn.com/files/e3b0c648-01ca-425b-a921-b62e4c3db246/coreldraw_x8_full_version_free_download_with_crack.pdf
    • http://finepade.pbworks.com/w/file/fetch/144786885/cursive_handwriting_worksheets_a-z.pdf
    • http://mukibilevejo.pbworks.com/w/file/fetch/144859341/56401215362.pdf
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144564051/revue_technique_citroen_c3_1.4_hdi.pdf
    • http://pukagij.pbworks.com/f/what_is_whatsapp_gold_app.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f8.bin
307988b53e8ee357536922de6b8c54f0f5c6c425c1ce9ce7a5e15bf3569b2333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 5684 bytes
font_01_sfnt_off0000f76e.bin
a17ed510de0ae4689d34ec25543cbaf8fd64b5f601b5f8df97dc96f661c947ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 10928 bytes

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