Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e13a22d1a24b159…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 18:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eaa21c88bfcd1a07374f4694d019ae39 SHA-1: 062d3055f39fa057c1b34082b42fa1c641001658 SHA-256: 6e13a22d1a24b1597e9121e495de85aa24062e1a8420361a262b6b43041b9366
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, appears to be a search query, suggesting a lure to a malicious website. The presence of multiple external URIs and the link farm heuristic indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=how+much+is+a+32+inch+roku+tv+at+walmart PDF link annotation
    • http://bosemefawixuwov.mypressonline.com/5662289668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_5fd66a370d884.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/what_is_a_99_year_lease.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_5fe8f58212d47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fec10d3e11da.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/8ZgchiB/vr_horror_games_without_controller.pdfIn PDF document text
    • http://punejew.mygamesonline.org/define_clarion_call_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/tiger_rice_cooker_jbv-a10u_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/66542559446.pdfIn PDF document text
    • http://buweweja.epizy.com/tavida.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/kuzodavamafuderipiwamumu.pdfIn PDF document text
    • http://bagobopog.rf.gd/how_to_calculate_magnetic_flux_of_a_coil.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/chrome_browser_android_tv.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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5512 bytes
SHA-256: 42ca0a4eab9b9a273e9718906260bba3d45cb7d629e739d0235ea9f94293d920
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 10368 bytes
SHA-256: 3a8aa9f9037fead44507be3bae5224770cbe76b25422774c9755fea9f563962a

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