Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffd38df70f508c1…

MALICIOUS

PDF

93.9 KB Created: 2021-03-14 14:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6912f7dc247c724555835fb5851294f0 SHA-1: 53106db15a7eac9b4b8658dfd603d285568df369 SHA-256: fffd38df70f508c18b4d9855fe24e64c6b3c992d171c2947dbf08c31b04d071a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/wix?keyword=arctic+cat+alterra+300+manual PDF link annotation
    • http://profapp.pro/facebook_audience_blaster_freemxjkz.pdfIn PDF document text
    • http://stroymarketmetal.ru/vurozasiforuxaxinotitifxc5sa.pdfIn PDF document text
    • http://eurozone.pro/sejda_page_remover3k3rf.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/lexus_gx_460_price_in_uae_2020wde07.pdfIn PDF document text
    • http://legendbilisim.com/who_invented_school_tik_tokafu9z.pdfIn PDF document text
    • http://callup.today/pace_wireless_modem_router_with_sim_card_slotup5of.pdfIn PDF document text
    • http://eagleaff.com/what_is_the_21_day_sugar_detox_diet6q1x8.pdfIn PDF document text
    • http://zoosalon.org/massey_ferguson_3545_reviews3lbwt.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01411a74-45bd-4998-a67a-c17c70daa5e6/whats_the_best_jump_rope_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362e41cc-068a-44bc-86c0-559535eb9975/zoxivopezok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440a76ab-2765-432e-9ff0-8068b2a574c5/technics_sl_d20_turntable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd6d44e-7192-4e0d-8072-a6ae80ac53d1/94602207597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7cf32e-95d6-4b04-862f-d3046bf7c63f/11318733225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2116ce2a-c4ae-4251-a21a-8cd0bb0f66a4/38249441724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587cdf84-f429-4338-89af-74826df66903/54204654119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c48ef5f-30c4-4fd1-8e54-695d1d782539/what_do_you_call_someone_who_is_a_quick_learner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d126882a-5228-483f-9a68-33035d9bc4e5/35519478007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d16244a-086f-43d3-b09b-3b0e89c1b56e/femofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13eddc2a-f6e4-491f-a4c3-63d11b174c24/top_5_regrets_of_the_dying_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/la_politica_aristoteles_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/nasov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD6 1724 bytes
SHA-256: 1af1fdb02f150e4b7fb9ab825036f356033ef8d1f6adfeb519aebbff9637efeb
font_01_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 5060 bytes
SHA-256: f2878cdcaa6da7e8fbe4f1265b47d519cc4765b9a9616e6779dab8c22a13bdc7
font_02_sfnt_off00014483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14483 11080 bytes
SHA-256: dde81c5b45002ca2274c75d565098d757a4a35da0d7a3bb7939f661573e7378f

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