Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5abd17eb7a6600…

MALICIOUS

PDF

67.7 KB Created: 2021-02-16 02:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4ecd42323607140bdeaf31e415c39e99 SHA-1: 2514034b7cee4c844a0ca647ed75d9b9e00ea9a9 SHA-256: fc5abd17eb7a6600c4ffe6ca1ed5e5e69ebdfbca39af8e6d776d9b5665d2d014
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=dimensional+analysis+chemistry+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386607/normal_60206a48ae6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401971/normal_5ff58a79ada33.pdfIn PDF document text
    • http://kawolamekepe.22web.org/gofuwefusilefuwoselotok.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/kinidikatefubudowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380887/normal_6005524cb9b35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5fc88ab8ecda6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_602809a4de2e9.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/4330945.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/ae5ed4be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5ff5e84e95315.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/dexeteparaminakuveda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5fc7c9da87a9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodugexibitomo.rf.gd/59413609233.pdfIn PDF document text
    • http://fivemawafazixi.epizy.com/forensic_audit_report_format_icai.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 5652 bytes
SHA-256: eb0cbb33f1ed516fc485c0b8d45ca71f9bfc00fe13b6d1cbb6f6c54e8b2a9f5b
font_01_sfnt_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 10072 bytes
SHA-256: 2023e910815707349b8d0490bc74021473c01a052f809df37e60f1801a0e31d4

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