Malicious PDF — malware analysis report

Static analysis result for SHA-256 c233f6e20e7711f2…

MALICIOUS

PDF

69.0 KB Created: 2021-03-05 18:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1d9bea10b449c3b0270cb4e58db3ddae SHA-1: f3deb7a642ca2ec319eb6e9d3441e202ec2b0927 SHA-256: c233f6e20e7711f2b8e0ce1e3efc71a4f09b27d5ad9255e995741a43502eb706
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable or suspicious domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a game title, which may be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=the+king+of+fighters+unblocked PDF link annotation
    • http://spain50off.info/mofuwopovejoxiboza4ij3o.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/problemas_ecuaciones_de_segundo_grado_doc8arge.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/qhb8hgs/43513741864.pdfIn PDF document text
    • http://pro-komp-master.website/payback_ejercicios_resueltosnquo8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5ff55a17efd7f.pdfIn PDF document text
    • https://cdn.sqhk.co/wamefuvew/egghegg/best_black_friday_tv_deals_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/heieprF/11518026797.pdfIn PDF document text
    • http://webmastervlad.ru/gba_emulator_unblocked_no_downloadtc20z.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/tBigJhe/how_to_draw_a_cute_cartoon_dog_easy.pdfIn PDF document text
    • http://hdsamara.ru/why_he_disappears_then_comes_backe9f58.pdfIn PDF document text
    • http://prizinsta.online/31786944770wnlua.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/iiVijhb/85235910640.pdfIn PDF document text
    • http://detonic-ordina.website/billie_eilish_my_future_lyrics_youtube30kqr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_5feb902d952b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xunixamobogu.epizy.com/telugu_movies_2019_hd_3gp.pdfIn PDF document text
    • http://fifetovijoweka.rf.gd/what_is_discipline_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26346575-9b20-42f3-b257-84e7786ad61b/xufir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612cb5d5-bd7c-4f52-adf0-2e052a3fc7ea/batevidode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff590df-4326-4832-b56e-6bff92c479bb/what_does_endorsements_mean_on_your_drivers_license_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc862c1-85a1-40d4-8a09-d4e3277e9803/mathematical_proof_maths_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75505561-8c6d-4cd1-b187-e32ac81f42b2/15227024004.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_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 5228 bytes
SHA-256: 2881219ced6c902161ba49ad203f0d00bf87b1cf6bc9749283a4931a8531bacf
font_01_sfnt_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 10028 bytes
SHA-256: 1940207acf6da981baef05bc49dd1f3e06c138e4737a75aa138d4616ed538d4c

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