Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c0d7e6f2f5ee38…

MALICIOUS

PDF

83.0 KB Created: 2021-04-13 10:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39b8351ce9215d44aa203ae6bd44613a SHA-1: df913cf777740d97e2651516bebe57f28ee2bd5f SHA-256: b2c0d7e6f2f5ee38a516281ad4fdbc3007949e52ab781c062f86021903112a29
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://kuzutuzo.ru/strik?utm_term=what+are+the+different+types+of+fiber+connectors+cite+their+disadvantages PDF link annotation
    • http://vinnipoh.fun/mumelatujipimeopxw9.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/5jhCJD1/87799531716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_60171955e2096.pdfIn PDF document text
    • http://jidameke.mypressonline.com/mevivudaliwom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478430/normal_5fd7794a9504a.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/toshiba_lcd_colour_tv_32_inch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fca83c924914.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/jiJyCgj/nitipazas.pdfIn PDF document text
    • http://bazorapugaji.iblogger.org/international_marketing_articles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_6047514d1d51a.pdfIn PDF document text
    • http://jiresumojunivup.22web.org/wow_classic_warlock_fast_leveling_guide.pdfIn PDF document text
    • http://migerov.xyz/how_much_do_crossfit_owners_makeg8nnb.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/hdljbid/vevas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabunubefuxa.epizy.com/resea_de_el_libro_romeo_y_julieta.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_2c0e90a4499147998569814a2d9c0e71.pdf?index=trueIn PDF document text
    • http://givoresop.epizy.com/computer_accounting_with_sage_50_complete_accounting_2020.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_f6c5e771b25e4a0db29daead63c53379.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_a209633a3b6f46088fc2066a498fcd0e.pdf?index=trueIn PDF document text
    • http://nadalapaxizo.epizy.com/fawovezabexoka.pdfIn PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_d22d1ceccc384c1d8fdb0ec49d34845d.pdf?index=trueIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_b946ec2cc912401f9ae7ce7d15554e44.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5700 bytes
SHA-256: 7d090c0c0e9cbd7f5006d8d5695bbdce4fa15cab40e136f3a5bfd0de85f061c6
font_01_sfnt_off00011856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 11068 bytes
SHA-256: bb2c6a2ffa2dc8d252b68789f3d286c2df3342f3fb294cc8bdcc490cfc3dbe7f

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