Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf10f3e553283751…

MALICIOUS

PDF

73.8 KB Created: 2021-03-19 11:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a64b740a2e0efb05a82e5eab3f0487d SHA-1: e290ce514e0a5848b316f61b267a292452e7cf4c SHA-256: cf10f3e5532837516694399a043d86cb4499fec37305c8ba4609e73cf3affab6
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a phishing lure disguised as a search result. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/award?keyword=convert+html+to+pdf+linux+command PDF link annotation
    • http://kigazuvunawolux.iblogger.org/polexunuzomefimok.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/how_to_reboot_a_motorola_android_phone.pdfIn PDF document text
    • http://vofawurokalini.22web.org/medivetumadenukebekoputa.pdfIn PDF document text
    • http://mulotaras.iblogger.org/can_i_add_apple_carplay_to_uconnect.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/zadokekivolupijiwigil.pdfIn PDF document text
    • http://zirirukefup.22web.org/50521812295.pdfIn PDF document text
    • http://kesisekojabaz.iblogger.org/24237372080.pdfIn PDF document text
    • http://giviwopifa.22web.org/luzexeletepabuwivanetedo.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/indian_stock_market_basics_for_beginners_in_hindi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekifovep.epizy.com/blank_world_political_map_free.pdfIn PDF document text
    • http://lepamiruketujuf.epizy.com/asap_mob_cozy_tapes_2_album.pdfIn PDF document text
    • http://dirijuk.epizy.com/93520014882.pdfIn PDF document text
    • http://vejajideb.epizy.com/in_telugu_video_song.pdfIn PDF document text
    • http://tasifomarefid.rf.gd/rotebojofaxexuvavo.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/fisherman_s_blues_sheet_music.pdfIn PDF document text
    • http://bitudisejopelak.rf.gd/sepak_bola_liga_indonesia_2019.pdfIn PDF document text
    • http://kubuxakul.epizy.com/70754353664.pdfIn PDF document text
    • http://rakemexovujepez.epizy.com/what_do_i_do_when_i_get_to_sootopolis_city_in_pokemon_emerald.pdfIn PDF document text
    • http://zevovalik.epizy.com/dofebigamugajoxem.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/who_makes_the_best_chest_freezers.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/gevamerifegolovetu.pdfIn PDF document text
    • http://vorukozepinuvu.epizy.com/can_an_obd2_scanner_reset_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/gowutoteviwa.pdfIn PDF document text
    • http://peburidil.epizy.com/analisis_y_desarrollo_de_sistemas_de_informacion_sena.pdfIn PDF document text
    • http://fajamoluw.epizy.com/land_contract_form_ohio.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_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 5252 bytes
SHA-256: 45ae469fbd150991b56de160630616c510f2698bdceea86ec474122ff5f7e801
font_01_sfnt_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 10836 bytes
SHA-256: 6b0480df654b3319b5762e66122b8d6e6ce38fdf0e17d887fd80e385c8bfe9ce

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