Malicious PDF — malware analysis report

Static analysis result for SHA-256 980ea2b4ed6c355e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-10 10:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a7d25ce533b6707edc18d3095a1919fb SHA-1: 5ffcb5ca6ba2ff24e943d688259f3d4ebad8520b SHA-256: 980ea2b4ed6c355e3d1a094337e62cfbdc375ea3cd4835f5d1ea808928bd3f65
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 0.9998

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://fokemale.ru/123?utm_term=calpers+long+term+care+claim+forms PDF link annotation
    • https://cdn.sqhk.co/letinumi/7tjtbPz/20941877079.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/gTybzji/galaxy_on_fire_2_hd_ships.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/illinois_real_estate_broker_license_renewal_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/hcgcYhI/pmi_lessons_learned_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/Zhhicya/fitbit_versa_2_reviews_amazon.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/how_to_setup_blackmagic_intensity_shuttle_thunderbolt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_3cc20654df6745b3aeb661cbda6a4c13.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_114a849e229c46d3877579a0ffba91d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/34144630617.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/11430033836.pdfIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_7be19ed9de48457e85f690f641c06c23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/tetekuwoxuweja.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/49099360611.pdfIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_82ab3e81b57443b492a5acf9c06d9ca5.pdf?index=trueIn PDF document text
    • http://jofanemapax.epizy.com/dibuja_el_sistema_endocrino_y_sus_partes.pdfIn PDF document text
    • http://mekuroxowu.epizy.com/dasapulugaxovotos.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_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 5240 bytes
SHA-256: 24d78b13d365e6889cea5ad0cd8f1a15512ec26881bfe76e240c8bae06938bb2
font_01_sfnt_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 10952 bytes
SHA-256: 9417e0e0ecd52356fd2093c7262d55ecc29c534903736ecbb2677659de26ec7d

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