Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4005143aec5bdb3…

MALICIOUS

PDF

83.8 KB Created: 2021-03-16 15:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9483286d64902c186c975a4245769f0 SHA-1: fabeef6d2e854808cab479ac68e0e6918313c079 SHA-256: e4005143aec5bdb3d2249ce5fe83d5211fd540f5cb0fdf5a58bbb0a6a7a3ceba
186 Risk Score

Malware Insights

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

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 0.9996

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://ponafet.ru/strik?utm_term=los+hijos+de+sanchez+pelicula PDF link annotation
    • https://cdn.sqhk.co/napumefu/e8GjfZA/whatsapp_messenger_apk_download.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/72820380852.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/roxarobotijavesoboxa.pdfIn PDF document text
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/zufodogukuxenikataba.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/yhbg4CZ/52167588936.pdfIn PDF document text
    • https://cdn.sqhk.co/mafozerekat/NVih4M3/business_intelligence_manager_resume_example.pdfIn PDF document text
    • https://kukedinuril.weebly.com/uploads/1/3/5/3/135326584/7455275.pdfIn PDF document text
    • http://tibojisitixuno.22web.org/adjudicator_s_field_manual_chapter_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/dmEjjS6/pubg_stylish_name_generator_online.pdfIn PDF document text
    • http://wupupetobuzune.22web.org/telecharger_whatsapp_gb_7._35_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/hgjdgiD/90436694383.pdfIn PDF document text
    • https://danigutido.weebly.com/uploads/1/3/1/1/131163693/kelopotas.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/Uiigql6/zasetifuvomisutamakumeze.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/hagcvjf/45503140101.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/5497103.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/gjib8if/68802893853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woniwasazox.epizy.com/90973676903.pdfIn PDF document text
    • http://subedawulowuwo.epizy.com/bookkeeping_in_excel_format_free.pdfIn PDF document text
    • http://famekemij.epizy.com/qualitative_research_proposal_example_psychology.pdfIn PDF document text
    • http://pumajuxav.rf.gd/80182556273.pdfIn PDF document text
    • http://vafegomadi.rf.gd/44209840855.pdfIn PDF document text
    • http://zopiwirikidow.rf.gd/internet_explorer_11_for_windows_10_32_bit_filehippo.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_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 5132 bytes
SHA-256: b96bed653c2357563a8e0f8cb075550e6f286f78749c050e8981be981a55c158
font_01_sfnt_off00011892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 12168 bytes
SHA-256: 197209a46bf72e18ba6d8471c879e6023465feb28d1e3ef8d17fade4d1d901c5

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