Malicious PDF — malware analysis report

Static analysis result for SHA-256 285d178592578ee9…

MALICIOUS

PDF

77.5 KB Created: 2021-03-03 23:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8620f3913eeb145f7cb50fb78c30f0ed SHA-1: 4e4fd09f0b376bbf91ccdfe504d9ee6198629f1f SHA-256: 285d178592578ee9c286132fcc0c9f2eb54a6934f53b992744a21dfb38529823
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

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://leonvi.ru/strik?utm_term=toyota+corolla+2016+battery+price PDF link annotation
    • http://tupaxeguna.scienceontheweb.net/4640153433.pdfIn PDF document text
    • http://nogezat.iblogger.org/liquidity_risk_management_guidelines_mas.pdfIn PDF document text
    • http://steelsho3.club/183827296iaup6.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/gxi9ZSC/43848283992.pdfIn PDF document text
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/xajevezizorok-werapiledozuxob-gopavejudox.pdfIn PDF document text
    • http://zuvels.xyz/mutuxenozafelav3e1.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/nigyngh/cracked_screen_wallpaper_transparent.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/graphtec_ce5000-60_parts.pdfIn PDF document text
    • http://samo-katim.ru/population_pyramid_stagesjxz0b.pdfIn PDF document text
    • http://itgermany.net/adosphere_2_download_freee9gd8.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/1898608.pdfIn PDF document text
    • http://zeraseb.66ghz.com/fokerubomuvoperezixufowu.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/kixamajopomemaxes.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/boss_audio_bv9364b_wont_turn_on.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/63717391340.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/teaching_by_principles_4th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/what_best_describes_greek_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/60546975029.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/walmart_black_friday_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 3068 bytes
SHA-256: 4d23f73b0900545770cdf28f25019854fc8eeac965a10b7ad9d4c44a502bf2ae
font_01_sfnt_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5420 bytes
SHA-256: 8388fb4197eddd1de65f5a7bafe32d8ed0c3e4a5f7e85ca6b7cf789ccfa924ef
font_02_sfnt_off000100bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 11536 bytes
SHA-256: 9c837872f4d5c72381984b6b63354a10c037d21cf3ecc699fae0fe818c85aa74

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