Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5722f47e69447f…

MALICIOUS

PDF

70.0 KB Created: 2021-04-02 16:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3d18c42c2c1922c1f1417fe497a32ca0 SHA-1: b2070f0f0f519a308762c93dce3006c724ef2611 SHA-256: bc5722f47e69447fdbebbf8fb03475cca4d8a5600dfce4db5a7ff4ea71b7501f
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 0.9991

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://xezojetit.ru/wix?keyword=physics+regents+june+2014+answers PDF link annotation
    • https://cdn.sqhk.co/seworani/geAhiln/fireman_sam_characters_names.pdfIn PDF document text
    • http://goproits.com/tadubogetipaturosapolubok7ip.pdfIn PDF document text
    • http://digitalmicroteter.xyz/tata_safari_2021_modelzia66.pdfIn PDF document text
    • http://productwood.ru/fios_g1100_router_settingswearc.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/dSJjcic/74328397611.pdfIn PDF document text
    • http://accface.in/fantastic_mr_fox_online_watch_free24kmj.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/ijggS30/xakalez.pdfIn PDF document text
    • http://nerroba.info/baby_bjorn_high_chair_tray_australian5chf.pdfIn PDF document text
    • http://phrensy.co/kuhnhausen_1911_shop_manualj10e8.pdfIn PDF document text
    • https://cdn.sqhk.co/takulowizi/ddhEvia/45224219170.pdfIn PDF document text
    • http://usacreditscore.info/90495555305hqtby.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/mujumejevobov.pdfIn PDF document text
    • http://pusapev.scienceontheweb.net/reviso_bibliogrfica_tcc.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hbjbhia/mosekewowokaneroju.pdfIn PDF document text
    • http://telemprom.xyz/xiwoxuva7yvz7.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/head_soccer_la_liga_game_onlinejrzkt.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/neduw.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/aseptic_processing_operation_contamination_control.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogetowem.onlinewebshop.net/calculus_1_review.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/free_letter_blends_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/retolitegedon.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/what_is_ict_system.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/the_vampire_diaries_season_8_episode_11_egybest.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_off0000d3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E8 5712 bytes
SHA-256: 4efa5235a234f7fd90ada0153d58c318a07b108bf506fcad5702623e8cb3eb43
font_01_sfnt_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 10620 bytes
SHA-256: 522d6ca34ca5ca0a4c1c68a9bc7e958eb6b60085bea65d8cbd12c49c544b5c5b

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