Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4152da75756039…

MALICIOUS

PDF

68.3 KB Created: 2021-03-10 01:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d9c55b35365ec7f1bc7421778e67296 SHA-1: 3105ad39fc94f60a2de2138286cf0baf7c04f4ad SHA-256: 8a4152da75756039718b536ad3047486fdcb340bec5fc9d01208701c58a71dca
186 Risk Score

Malware Insights

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

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 0.9992

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/wix?keyword=the+practice+of+statistics+chapter+3+test+answers PDF link annotation
    • http://joweponula.mywebcommunity.org/the_complete_tales_of_winnie_the_pooh_book.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/5d5a139.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/chfhgje/18720948355.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/dd_monster_list_3.5.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hegcRiE/clash_of_clans_war_attack_strategy_th10.pdfIn PDF document text
    • http://povujusuwaveva.iblogger.org/mepuborivivevifusenefese.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/BggjeLg/taxedemiluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/mobixipotex/jeiic3W/sprinkle_islands_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/iaYjakL/disney_apple_watch_band_series_5_40mm.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/bhagavad_gita_english_iskcon.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/fEZ8hbH/voting_map_2016_presidential_election.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/ULihRhe/21176771808.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/zadevapujagi.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/xejg9ia/ike_s_love_and_sandwiches_tempe_menu.pdfIn PDF document text
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/vuzipotazexamed.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/jeFigic/figusuzusabupuva.pdfIn PDF document text
    • https://cdn.sqhk.co/votawusebak/gfghjeJ/duxedebajazomuvi.pdfIn PDF document text
    • https://rasiwumuseb.weebly.com/uploads/1/3/5/3/135350461/mekuronijujes.pdfIn PDF document text
    • https://degapepe.weebly.com/uploads/1/3/1/8/131856160/kemaxirenen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givaradipokez.epizy.com/88195824974.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/58357055475.pdfIn PDF document text
    • http://lesunew.epizy.com/que_es_mejor_terapia_cognitivo_conductual_o_psicoanalisis.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/pegaxuse.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/beetle_bug_2_apk.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_off0000cf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6A 5276 bytes
SHA-256: 699de1d1639bdc54719c83438f17e10ba1d1172683f2456e4f654ff41618f325
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 9904 bytes
SHA-256: 146e73d98cb4043a10255ed68353b76c363d0b0af0bc8efefc66158953af2c8a

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