Malicious PDF — malware analysis report

Static analysis result for SHA-256 18359787995e3efc…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 15:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0c6e08ab516b18ab86074bf28cb06994 SHA-1: 271b21f5635dc40258457c4152438da1eb51706c SHA-256: 18359787995e3efc4f6c5275c06d6897266e386450a26b389d559605a6d757bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to attract users searching for game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=super+mario+3d+world+rom+download+3ds PDF link annotation
    • http://ejqy.com/93614468105ln72k.pdfIn PDF document text
    • http://gnfcns.info/guilty_conscience_songu5xvi.pdfIn PDF document text
    • http://tryplafond.xyz/lyman_cast_bullet_handbook_4th_edition_downloadoiwx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471240/normal_5fd161a6b7806.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/ardougne_knights_guide_osrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_60322b77bda1b.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/vidapujakenu_wifesidit_gadixo.pdfIn PDF document text
    • http://molotkov.site/xbox_360_wireless_controller_pc_receiver_not_workingus9fg.pdfIn PDF document text
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/69a37b9db5bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465397/normal_604d831b16d89.pdfIn PDF document text
    • http://construt.site/31126387843bo0zy.pdfIn PDF document text
    • https://kimubewej.weebly.com/uploads/1/3/5/3/135329621/vimon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogefifuga.rf.gd/61398379563.pdfIn PDF document text
    • http://foliminuga.epizy.com/13142106412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8f58b9-8bff-4fce-8465-f282bf6f64e7/watch_forged_in_fire_online_free_123movies.pdfIn PDF document text
    • http://pafewanofa.epizy.com/73876601478.pdfIn PDF document text
    • http://nixabofivi.epizy.com/14764864521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d69f09-dfc6-41dd-b25f-f6e7fb571c66/82840444727.pdfIn PDF document text
    • http://pefogitoveni.epizy.com/tutexeruwot.pdfIn PDF document text
    • http://lejoguwiguf.rf.gd/femokajuweb.pdfIn PDF document text
    • http://pitefabe.epizy.com/47565015687.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_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 5464 bytes
SHA-256: c87e8b127d74eed20efde90f20c2728873556e5ff747c84cc356f87335780c42
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 11064 bytes
SHA-256: b1289e4f976755de72d254be791ebe9bb74bce32d24499e3dceb7786fe2cb41c

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