Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed3e9c5e6ece6c5…

MALICIOUS

PDF

67.6 KB Created: 2021-02-26 21:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0f5a96d97ac8690dd8f539237d2e091f SHA-1: fb08f8c2fa690bdaf87e53bef52fa41162865c24 SHA-256: eed3e9c5e6ece6c53d0cf4f5bac92255422afcebcfae9a0bf11e6412e1ef4487
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Wj-iv achievement subtest descriptions' and 'wkhtmltopdf', likely a lure to direct users to malicious websites for further exploitation.

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://jottigo.ru/award?keyword=wj-iv+achievement+subtest+descriptions PDF link annotation
    • http://zabemaladameg.medianewsonline.com/year-end_closing_procedures_in_accounting.pdfIn PDF document text
    • http://centerbluebadge.com/90954662020su03f.pdfIn PDF document text
    • http://markettop.pro/how_to_practice_your_golf_swingt0rfo.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/zaranufepege.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/on_the_road_truck_simulator_console_release_date.pdfIn PDF document text
    • http://redit.fun/bluestacks_emulator_for_android79b6i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5fe132f6d7e70.pdfIn PDF document text
    • http://copyrightmediahelp.com/dakixukuxifabi4hmba.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/virejul33422.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/gizmos_calorimetry_lab_answersjp9ky.pdfIn PDF document text
    • http://raffle.website/1958667300771cw2.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/20628191445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namepafubi.atwebpages.com/realspace_magellan_collection_corner_desk_dimensions.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/charlie_and_the_chocolate_factory_musical_melbourne_youtube.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_off0000ca73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA73 5604 bytes
SHA-256: ea0528e78fd886b3842cca12224db4d6b2423a968fa505fe6ec31c4a3ff384bf
font_01_sfnt_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 10428 bytes
SHA-256: bc83184fe23b46240a825012c7a6fd64e16b38e5827e652343f456d1abd683cf

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