Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e59cdcda40894c…

MALICIOUS

PDF

73.8 KB Created: 2021-02-15 12:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 812df95f4735d4a7fbff0ff8ba2073c6 SHA-1: 9dfdf4797a75fc0c3e78d70ac1d60a6e0e958a3c SHA-256: 60e59cdcda40894cdcfa3f2afc9c92a649b8e10878cc4504e608664cf0a17014
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, possibly via embedded JavaScript, to download and run further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://baarspo.ru/123?utm_term=what+is+the+full+meaning+of+misguided PDF link annotation
    • http://3203epworthcres.com/vatekinapqnbzf.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzirixowev/vjaGjd7/giselelal.pdfIn PDF document text
    • https://pujowelitolav.weebly.com/uploads/1/3/1/4/131438356/rubaf-linidufikidus-vinufazarej.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/iekjijf/kanemujige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376621/normal_5fcf616824d45.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/iiiuYAX/pinball_heroes_uncharted.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/131776.pdfIn PDF document text
    • http://xsale.trade/motesurofasnmqdp.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/ijjf0hb/parosemu.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/5jdjzja/curling_3d_apk_mod_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/dgeltZF/marshall_metal_boya_renkleri.pdfIn PDF document text
    • https://fojexoduzasob.weebly.com/uploads/1/3/4/6/134693365/2641335.pdfIn macro / runtime command snippet
    • http://aycotoro6.xyz/nj_transit_bus_schedule_163_164kql31.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/bFQgejf/non_emergency_chatham_kent.pdfIn PDF document text
    • http://xteenware.online/2774630487b2cpc.pdfIn PDF document text
    • https://cdn.sqhk.co/fasIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibuwigukakew.epizy.com/dearborn_police_department_incident_report.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5240 bytes
SHA-256: eadba25c8ecac88d87a93dfe7473075283be45e37c1a324a019278ba5e43714d
font_01_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 11628 bytes
SHA-256: c88f474ec06bf7866c9bff6b09e9b305b2436aae9a74582a4b9b38d9833b3197

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