Malicious PDF — malware analysis report

Static analysis result for SHA-256 410eecb32cebcaa3…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 10:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b809eb5b1eda78470e9fafe92e5be99c SHA-1: 181e654b07e4d0dd57203655637ba55c17eced45 SHA-256: 410eecb32cebcaa3dab36310a6691866633d0ce753ad30cac134227053520c00
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 0.9998

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://dugedepap.ru/wix?keyword=nissan+online+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63cbd15c9f.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/dnd_unearthed_arcana_artificer.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/possessive_pronouns_spanish_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_60438fd884cf4.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/arnold_schwarzenegger_bodybuilding_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/giarjgg/6987809565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_601b077df32f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_604221c0ecc22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_603382df89a7d.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/iHjcTgg/gobug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5fce3ab3101ce.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/hhdihii/97563250037.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/Eg9jbCR/6824103459.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/FgeglIZ/xarejepewanojin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_6044912b4be13.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/gcKIwBb/us_conflict_game_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_3367d6201ce6492c8f7b14b64fd10223.pdf?index=trueIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_7d9e0742f5644c5db82eafea4117e7c0.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 4892 bytes
SHA-256: 4e02e6c23b52db993144e33da80cc3b4779fd850856af0577111485ee4f137df
font_01_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 11364 bytes
SHA-256: 1d39aad2891f1f6b2dab8e4758f00f00fa966032fa4d01632ac61ec00c611c69

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