Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dd2239b6de1c89…

MALICIOUS

PDF

76.6 KB Created: 2021-02-27 23:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8d12d50273260778ab30b774dc8b3d03 SHA-1: c181482b989dab83ef800586953798a30e4da4a0 SHA-256: 74dd2239b6de1c89152dc4b245ed6a6a30a778f3b0db23fb929e07f6cd761e48
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content hosted on these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/123?utm_term=how+many+types+of+fire+hoses+are+there PDF link annotation
    • http://virilibag.66ghz.com/jolaxobifusekivo.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/philippe_richard_pressure_cooker_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/V4hfQhe/nezufomotamisomo.pdfIn PDF document text
    • http://hiziryigit.online/nfl_tv_schedule_monday_night_football4lf2b.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/power_xl_vortex_7-quart_air_fryer_manualvxudh.pdfIn PDF document text
    • https://cdn.sqhk.co/wovegase/EifZGid/roxujedurunaxilezawel.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/47671460629.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/22353566918.pdfIn PDF document text
    • http://hr-insider.com/dojikowunatokkh1a.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/chgspjj/noob_vs_pro_vs_hacker_atlantic_craft.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/hgjbuJM/brabantia_perfect_flow_ironing_board_cover_c.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jdc9OxD/sukenerum.pdfIn PDF document text
    • http://santand-es.com/nupuwemufefa6pltl.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/IAbHjct/jajagemogikox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/petubapizo/icom_ic-2100h_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/bittorrent_free_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/24211479842.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 5052 bytes
SHA-256: 6be8394236b279f2f63cc8312af4514cf296b1da8bce878ee6293652931b6061
font_01_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 10416 bytes
SHA-256: f8af9d716456daa20314cddc837f257feb737386e0e988d66f81216a2b219675
font_02_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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