Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6c1564f39cda52…

MALICIOUS

PDF

83.3 KB Created: 2021-03-04 17:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54703e3c46f7698e8f8dbaa9f783192a SHA-1: c69adacec6541f25fbf714aa5726ab2c7b43f806 SHA-256: 6f6c1564f39cda52c04de05cd8a234fb5af56c7429cd290fd5a075b297f5e6c2
156 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 0.9950

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 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.
  • 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://midufefew.ru/wix?keyword=wipeout+mod+apk+free+download PDF link annotation
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/557691.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/ehbghjc/71791315262.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/hggctUO/rotten_tomatoes_best_action_movies_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/cu8TVge/26135134160.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/XXigjhU/download_game_alien_zone_plus_unlimited_money.pdfIn PDF document text
    • http://copyrighytsupport.com/938640673435qpcf.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/8633a.pdfIn PDF document text
    • https://gebuzikiko.weebly.com/uploads/1/3/5/4/135400935/3530348.pdfIn PDF document text
    • https://mowibusox.weebly.com/uploads/1/3/4/5/134591082/mejinasonefemof_lasunemapirak.pdfIn PDF document text
    • http://testersairf.xyz/what_does_the_fig_tree_represent_in_matthew_24dv6ae.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/7142603.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/fhiwyia/80954926642.pdfIn PDF document text
    • http://losinglotterynumbers.com/arenal_volcano_5_star_hotelsu07pn.pdfIn PDF document text
    • http://detonicufficiale.website/problemas_genetica_resueltos_4_esotvuix.pdfIn PDF document text
    • http://worldhold.online/21715882940uhb94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/12158748297.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_45eb2046a8b2444d80e524a53ad68099.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/renaissance_periodization_template_macro_diet.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_0819274a42744029b8a64a9c228ef6d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satuja/kabariterivusudimolaber.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/bejawada_durgamma_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/android_battery_health_check_code.pdfIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_7b8d3f40b353417b88649a72fbbce0d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/panovezozef.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/demographic_information_in_research.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/love_story_tenor_saxophone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/lekobutavipadegokekegij.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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 5176 bytes
SHA-256: a8a69ccdb2408045b300bb8791bab30ca788ea8cf6be8a4b92f07eaf6f17245b
font_02_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 12832 bytes
SHA-256: eee0c2c6d503dc94a4e9af1312cef2e08168f2cc93a3b808ac773d61816604e5

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