Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e04002290cd4a2…

MALICIOUS

PDF

84.0 KB Created: 2021-03-23 14:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c3346f08c69cda30aed3960b54cf0a74 SHA-1: 54b06c2c84e270ae1a69b4290cd5bfb668944571 SHA-256: c0e04002290cd4a27812306b72a6f49ec4c95de0d9f485db8d864f5e922a9044
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=atlanta+beltline+map+pdf PDF link annotation
    • http://alkostore.xyz/raisin_in_the_sun_testkgz2t.pdfIn PDF document text
    • http://twirlini.com/operaciones_combinadas_con_fracciones_y_potencias_negativas00wti.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/rusiseduli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fd10cf74caf5.pdfIn PDF document text
    • http://zebrait.fun/120971248782lon7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5fd3242be7684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5feecf161205d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_6002a335227ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_60270a7442cb1.pdfIn PDF document text
    • http://sixegonupujuj.22web.org/what_is_os_mode.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/acr_bi_rads_5th_edition.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/bufodudusisise.pdfIn PDF document text
    • https://dodafawo.weebly.com/uploads/1/3/4/6/134698388/sefuge.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/aircraft_metal_structural_repair.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/4ad8572e-c988-4a62-a131-e93667166ba4/lowrance_elite_4x_chirp_transducer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f04ee832-f4e3-4932-9a90-812974eda73e/rixebanajadogafo.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/97995686858.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/17055851998.pdfIn PDF document text
    • http://legipugubawaw.epizy.com/46700345950.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_off00010946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 5040 bytes
SHA-256: fe6a6b71df74329cf2bd894dae25fcc1c006c82bc045ca123bd86f08a8de1d0d
font_01_sfnt_off00011a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5C 11796 bytes
SHA-256: a9e46d3a3f527d7b72f084aa85f563afb8b0b66c9c2cf70eb49de39f36c235c7