Malicious PDF — malware analysis report

Static analysis result for SHA-256 f659e7e2b3a98019…

MALICIOUS

PDF

73.3 KB Created: 2021-03-14 09:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d775cb5f0cb7402cc87cf73821c3378d SHA-1: 6de4550c6e53b9ae44583b5ab02aca6f78b5d5c4 SHA-256: f659e7e2b3a98019850b14b2f138374d3b5571cb51028f1d0f511b531c63fc3b
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a URL that appears to be part of a phishing or malware distribution scheme, disguised as a crossword puzzle answer key. The presence of external URIs and the ClamAV detection strongly suggest this PDF is intended to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=ecology+crossword+puzzle+answer+key+pdf
    • https://cdn.sqhk.co/didozakir/7gdji7k/51296864944.pdf
    • https://cdn.sqhk.co/kisesawaropo/cgdja8P/zombie_road_killer_hack_apk_download.pdf
    • https://cdn.sqhk.co/voravaxa/jfMgdjh/litepoxemabamopuzelozal.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/court_of_mist_and_fury_series_order.pdf
    • https://cdn.sqhk.co/tinolaseja/Fhbnr72/hotdog_evolution_clicker_games.pdf
    • https://static.s123-cdn-static.com/uploads/4384825/normal_5ff58ae6cc007.pdf
    • https://cdn.sqhk.co/fozuwasixeja/fVibQId/bagokopawokokinexesevata.pdf
    • https://cdn.sqhk.co/raxoxawupej/gjhgTG4/87829669777.pdf
    • http://mikovil.mywebcommunity.org/dunkin_donuts_wake_up_wrap_turkey_sausage_calories.pdf
    • https://cdn.sqhk.co/ruwonumatag/fpcghvP/fly_wings_hack_apk_download.pdf
    • https://cdn.sqhk.co/kusedesomawa/VOMZjbg/ai_dungeon_multiplayer_servers.pdf
    • https://cdn-cms.f-static.net/uploads/4483365/normal_6013933e90862.pdf
    • http://dejivuxa.mygamesonline.org/66017439029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gosete/65671319738.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/ruwavowid.pdf
    • https://s3.amazonaws.com/woxotopapozokev/24957535931.pdf
    • https://s3.amazonaws.com/toguvaju/foscam_fi9900p_firmware_downgrade.pdf
    • https://s3.amazonaws.com/fewunadupop/bloomberg_professional_windows_10.pdf
    • http://dapibudajemuk.atwebpages.com/optiplex_755_sm_bus_controller_driver.pdf
    • https://s3.amazonaws.com/dejazuvorira/red_burning_rash_on_face_treatment.pdf
    • http://rolubumemetujin.atwebpages.com/fokawowimo.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_off0000e16c.bin
f974ec3ea2319791a4141a4ce81268aae05279d5031e2a9586a344e46a4ce808
pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 5588 bytes
font_01_sfnt_off0000f4ae.bin
5b14bf1f0bb980eee43ed0c058585bceaaf3a0cdf8f485a28cb7920c94841e24
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 10400 bytes