Malicious PDF — malware analysis report

Static analysis result for SHA-256 233dfa3facfebc70…

MALICIOUS

PDF

89.5 KB Created: 2021-03-14 02:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 96c2575973eb1d6c0ff08df4f79bfc02 SHA-1: c7f3fc8dcd0f540b4b645fb1df915fdf05578c23 SHA-256: 233dfa3facfebc702ba390f37f25ce2fcf56a5be78fad239f664c78634bc8de8
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the idea of a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=ifb+washing+machine+spare+parts+shop+near+me PDF link annotation
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/7918468.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/hinvGpY/dinakafitixa.pdfIn PDF document text
    • https://cdn.sqhk.co/panuwatosim/DzieWsJ/types_of_reports_in_business_communication.pdfIn PDF document text
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/pasuzoja-folid.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/1jdxTi5/neha_kakkar_new_song_2020_list_download.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/n8gijhZ/undertale_wallpaper_sans_and_frisk.pdfIn PDF document text
    • https://cdn.sqhk.co/gugusobazu/ae5ghKu/bidajamupasemejadet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417403/normal_5ff2a62051094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500669/normal_5fdcee3cd9181.pdfIn PDF document text
    • http://amsidgi.xyz/46408459838ymtmx.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/taurus_pt111_size00b27.pdfIn PDF document text
    • http://idealslimitalia-official.site/android_one_android_10_updatemraj2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fc8fe6e2ecc8.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/hjgHThg/duck_duck_goose_board_game_instructions.pdfIn PDF document text
    • http://mpvideo.org/352518158737oiya.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/hbsghnZ/3dtale_sans_fight.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/wumuxezuje.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/jekBZie/juzomakuvopikibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_60171311ea9c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/56542376827.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B04 5564 bytes
SHA-256: a3110ead99c6c0256758e17cd37017309ddcf2e175ad629bc28796712095db12
font_01_sfnt_off00011de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE6 10872 bytes
SHA-256: bf067d3177902af910f83a6e72a3c584866b59bd1ccbbc6657bfa7803369d43e
font_02_sfnt_off0001431b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431B 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06