Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98717b12fc84211…

MALICIOUS

PDF

74.8 KB Created: 2021-03-15 03:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: de49548403255cc6a00ffaefa738e0dd SHA-1: 2b5c37089c028c8fb5a1785b74a9d75f3e7c0208 SHA-256: d98717b12fc842116c902ee9406b28e12037ff4a25c9a9ad06b0c68881f73e13
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicating a link farm or redirection service. The ML classifier strongly flagged this PDF as malicious. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://baarspo.ru/wix?keyword=cuentos+de+hoy+chapter+questions+and+answers PDF link annotation
    • http://jibiduseg.22web.org/99000982019.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/tutukusoduvajuvu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffd68ef4e336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fcf475fc52ea.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/b5a260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_6002b81ad21ce.pdfIn PDF document text
    • http://top-salez.site/79488122939xnpql.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/13798411334.pdfIn PDF document text
    • http://ruseseru.iblogger.org/air_force_afi_enlisted_performance_report.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/5003967.pdfIn PDF document text
    • http://trackengine.host/audio_technica_at-_lp60xbt_manualqgv87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuporalegumema.epizy.com/32011300879.pdfIn PDF document text
    • http://fobeguwimot.rf.gd/10682248722.pdfIn PDF document text
    • http://jomevodirefu.rf.gd/kojomefememosirexutow.pdfIn PDF document text
    • http://defakulid.atwebpages.com/48937659574.pdfIn PDF document text
    • http://bepukugi.rf.gd/sativovirod.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/what_is_the_new_living_translation_version_of_the_bible.pdfIn PDF document text
    • http://togujekunigek.rf.gd/game_launcher_apkpure.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_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 5352 bytes
SHA-256: d18402c2ce582990b696f820806c9348d61ff4448fdcd40e7cdbc573a7f4df7b
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 11832 bytes
SHA-256: 2e86610c891740b4917ac0426224fdf3a5e08e170513ace10a41667cd6180c4e

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