Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eebf0b5fb9dcd64…

MALICIOUS

PDF

75.5 KB Created: 2021-04-02 00:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1087c88728436a16409106f1cbb238a2 SHA-1: 7a933bc81325b84ba1071b8bdf3ace8acc67d13a SHA-256: 3eebf0b5fb9dcd646377ba00cb6d35190b6b19c3577cd8af0b7c8309cb56bbf3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicating a link farm or phishing attempt. The presence of embedded URLs and the overall structure suggest it's intended to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/aws?utm_term=chicco+nextfit+convertible+car+seat+safety+reviews
    • https://cdn.sqhk.co/mozulunilex/3hdk1ji/gukuzifuririjegota.pdf
    • http://roxelejabojafe.scienceontheweb.net/how_to_start_frigidaire_affinity_dryer.pdf
    • https://cdn.sqhk.co/wowixepis/ikhdOf9/kafobusevufetigalimuwub.pdf
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdf
    • https://cdn.sqhk.co/rozesivotix/PXjiuie/game_of_thrones_cast_season_3_daario_naharis.pdf
    • https://cdn.sqhk.co/fimegasaz/hihfghC/samsung_music_share_with_windows.pdf
    • https://cdn.sqhk.co/rubekafux/gwhddKx/bejixuwaxaxadiri.pdf
    • http://pibarulajido.getenjoyment.net/the_definitive_book_of_body_language_ebook_free_download.pdf
    • https://cdn.sqhk.co/zimajigon/y2jgEzr/naxuwugekefewopu.pdf
    • http://pinenud.mygamesonline.org/aiff_d_license_log_book.pdf
    • http://xamoxipuwizutux.scienceontheweb.net/wozasalenusuguxeduzu.pdf
    • http://boketizabujig.scienceontheweb.net/archetype_examples.pdf
    • https://cdn.sqhk.co/tawibonikigo/gedFgcG/the_best_colors_to_wear_for_pictures.pdf
    • http://noxaduva.mypressonline.com/adjective_worksheets_for_grade_5.pdf
    • https://cdn.sqhk.co/kizafizutuw/fOgfUii/thrift_stores_near_me_open.pdf
    • http://kikababono.mywebcommunity.org/sitamipube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wolobugoxew.myartsonline.com/91168452558.pdf
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_48fd287bf80549fea308a4553a6efb38.pdf?index=true
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_dce8515082e445458d67ca8b7df6563d.pdf?index=true
    • http://tuwutexo.onlinewebshop.net/how_to_use_dash_express_egg_cooker.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea39.bin
1d10ef883a456a08bc3ff26b7d8b54110172a40c246d6fcb1c2e115e98caa61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 5336 bytes
font_01_sfnt_off0000fc76.bin
3363aafedc5c8b06e42cf95f791337b3ee5cd88f6363d134c4bfe2b710a3ea0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 10552 bytes

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