Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d80728444b8077…

MALICIOUS

PDF

80.3 KB Created: 2021-05-28 03:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2449e1281a3314a36d82658455100ea5 SHA-1: d93fe3e6a1500685cde77349a9dcee1921a60bbb SHA-256: f2d80728444b80771cc5546557b4a34f2746564c300e7dea4f56cde7739e9e35
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://vilenefex.ru/strik?utm_term=total+war+rome+ii+-+emperor+edition+steam+key+global PDF link annotation
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/karakapitopiji.pdfIn PDF document text
    • https://winofugunolef.weebly.com/uploads/1/3/4/8/134846497/dudawo.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/938353.pdfIn PDF document text
    • https://wulakajif.weebly.com/uploads/1/3/2/7/132740593/625404b5bf4.pdfIn PDF document text
    • https://tudanane.weebly.com/uploads/1/3/4/5/134596872/dddb2b3cf215d64.pdfIn PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/tuzabepe.pdfIn PDF document text
    • https://kuvakikarubefi.weebly.com/uploads/1/3/1/3/131383404/88c702a3.pdfIn PDF document text
    • https://kuwovewifinux.weebly.com/uploads/1/3/0/7/130775990/nazoxixetotami.pdfIn PDF document text
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/2198023.pdfIn PDF document text
    • https://kaxunuruji.weebly.com/uploads/1/3/4/7/134725802/b314c4dd996a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_606093fdcb53e.pdfIn PDF document text
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/xodol.pdfIn PDF document text
    • https://fanivimijebi.weebly.com/uploads/1/3/4/5/134594820/vobuwagavomozavunut.pdfIn PDF document text
    • https://welajelozasap.weebly.com/uploads/1/3/4/6/134695810/eef9beece1e.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/3179ce0.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/buwomowijikore.pdfIn PDF document text
    • https://veworokog.weebly.com/uploads/1/3/1/6/131606039/6918507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5656 bytes
SHA-256: 8c4448c91ee787fe984ec665f4014e55cdb7d77d76d6ff4ba6f7ed8a463a4973
font_01_sfnt_off0000f53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 12704 bytes
SHA-256: cbb1d4f50e74a31aafc7601170f3e4667547d5097d2a62336869e94d4593cb6e
font_02_sfnt_off00011dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD9 16240 bytes
SHA-256: 86499eb86014daa4267ceeebe4511a0bd47333a93bc9c9ed5c528177a65f03e9

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