Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22c15ab56bf82e6…

MALICIOUS

PDF

89.7 KB Created: 2021-03-20 23:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 973c7d1ca1dbd64dba1baff367d520b7 SHA-1: 41b07ee8cdeefb93c0337854e00f104aac60e260 SHA-256: e22c15ab56bf82e6eed1efc16f2c808fc59e7b89f7bd4d0693f7223fb84efe5b
126 Risk Score

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 0.9988

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://baarspo.ru/wix?keyword=base+pairing+practice+worksheet PDF link annotation
    • https://cdn.sqhk.co/vimavifuse/ieJeKhh/teranekavivuzowol.pdfIn PDF document text
    • http://egosikenclub.com/ys_lacrimosa_of_dana_fishing_guidezoly8.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/ghchchi/jegufixeduzunexaj.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/60943943542.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/physiology_linda_costanzo_6th_edition_free_downloadjcwor.pdfIn PDF document text
    • http://copyrightviolationcenters.com/kudobanib8ay.pdfIn PDF document text
    • http://rusherx.studio/vagepufemebhduc.pdfIn PDF document text
    • http://freud.icu/how_to_see_trading_volumekulga.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/BeoMlih/water_marbling_nail_polish.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/Fjehc9l/mortal_kombat_11_mileena_fatality.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegilifopom.myartsonline.com/fluke_intellitone_pro_200_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7668ca-4a92-4577-93e0-7b69640d2a8c/rarobalojamizetubi.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/how_much_are_the_baby_back_ribs_at_boston_market.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_0c4e78ad18f641a3b512f0873a63499f.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_b41cbf9ab8944dd0aafb6de2524aaeb0.pdf?index=trueIn PDF document text
    • http://zefuxaninegug.epizy.com/69286532775.pdfIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_d05a57ae0c0848e8b29c1c1bc347faf7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0910df-b6f6-4064-9265-530a77071775/modine_hot_dawg_vent_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8de0b9-fce7-4b8d-97b5-5f429009fca5/sunbeam_cool_mist_humidifier_instructions.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/xisirivuwipisekupowaxu.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/african_american_history_timeline.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/61381556222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd8ce35-ce5f-4ace-bde5-661f03b04173/is_toshiba_regza_a_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2d3c3b-93b1-4310-b232-869e87ad644f/modern_calligraphy_kit_for_beginners.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_off00010791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10791 5368 bytes
SHA-256: 44b102f17e04e9530099143678a794ad58f0ff89796b8746ec66314c4ab01852
font_01_sfnt_off000119e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E8 12252 bytes
SHA-256: 38efa13bcb123a06f60e2cdc475a13ce2c19d503cc5f3a61dc84ed8adff2583e
font_02_sfnt_off000143ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AD 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501