Malicious PDF — malware analysis report

Static analysis result for SHA-256 6920a6820b52e211…

MALICIOUS

PDF

78.3 KB Created: 2021-02-25 04:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e884465480c18a1f2bc503d22e5dfeb7 SHA-1: ce7f9c52f56eece9080874471b40236f45b20bc6 SHA-256: 6920a6820b52e2113e00a7e06d701cd063cd04c837a87dc144a965244b1e5287
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to use these links for deceptive purposes. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest the document is designed to redirect users to malicious content.

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://druttle.ru/123?utm_term=how+to+scan+120+film+epson+v370 PDF link annotation
    • http://antonio-ita.space/catecismo_de_la_iglesia_catolica_2020b9bmy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385014/normal_5fee8b8eea658.pdfIn PDF document text
    • http://paselon.getenjoyment.net/72828711283.pdfIn PDF document text
    • http://laxeded.iblogger.org/rasowukudepalamunomawepeb.pdfIn PDF document text
    • http://vodekageka.22web.org/google_chrome_portable_offline_installer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_6002704db8bf2.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/7410728467.pdfIn PDF document text
    • http://fortuneo-enligne.com/kikipanefowapmyq21.pdfIn PDF document text
    • http://tabanozu.iblogger.org/what_are_the_best_home_coffee_makers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5fe9b9d4850b4.pdfIn PDF document text
    • http://bepevekebezupu.22web.org/rawokipegukugowojasi.pdfIn PDF document text
    • http://giocodigital.fun/why_does_my_cordless_phone_say_check_tel_linegcbos.pdfIn PDF document text
    • http://italy50wow.pro/96606376288a1mms.pdfIn PDF document text
    • http://new-leggins.site/186821083582k6wp.pdfIn PDF document text
    • http://vash-fasad.live/fawufasopagupavovorojemegtw22q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_5fdb0ec46390e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fifajepetu.rf.gd/20345065175.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 5748 bytes
SHA-256: 6b110ef70a3d188fdf3681727772947368edf8e1843084ad1ddc9d648221170a
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 10776 bytes
SHA-256: 9d297a247f7e1f119dc072dacf210db7084888a409892ce796888d33a06a8994
font_02_sfnt_off00011632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11632 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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