Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d18b30f5d861636…

MALICIOUS

PDF

75.0 KB Created: 2021-03-07 02:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 65201dcdcd985df2e843766544b4ac58 SHA-1: 07d77d3261027a88a5d8d4bf5234a9106bdf1c2a SHA-256: 9d18b30f5d86163625dae202c9b162b3de126cc923bc92f11482a78a143447e6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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://druttle.ru/123?utm_term=can+you+take+the+permit+test+online+in+ga PDF link annotation
    • http://sajiwurejedetu.sportsontheweb.net/61279004875.pdfIn PDF document text
    • http://counterman.ru/wenujivaruvagaretexamuwidon18z.pdfIn PDF document text
    • https://jolofoni.weebly.com/uploads/1/3/4/0/134042869/zasadatibo_wexedunafudes_linuxodomoperid_dewujegoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499656/normal_60116dd815a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_601d14961bb13.pdfIn PDF document text
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/nizizuporefukid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_6010e627c692e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463565/normal_5ff4d9d5968d1.pdfIn PDF document text
    • http://prognoz-football.club/calculus_2_kenyatta_universityuaefz.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/what_is_the_role_of_indigenous_knowledge_in_the_indigenous_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384472/normal_6033eb5fed535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_601a7fd5dad9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_6030632bbd356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_601edeec2745b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxewape.myartsonline.com/ford_mustang_gt_price_used.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/how_to_get_facebook_recovery_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/zeloxude.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 5304 bytes
SHA-256: 0efef084158cb75512a05b43ff4d435a479fbfe10f1cc5d37cb9e401635487f3
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10436 bytes
SHA-256: c2c67234a7a3611c185304c1cd03604252b634b54b5c53d1d1c75dd11f102e41

Open this report in the interactive analyzer, or submit your own file for analysis.