Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8da52147d03c18c…

MALICIOUS

PDF

100.8 KB Created: 2021-03-16 17:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8047e48de13d127f96deeb2256ae3564 SHA-1: 4c5b3d935d08e787d7ac5848443686e6814080b3 SHA-256: d8da52147d03c18c5c80a45c281fa8cdbda8a24d958061ac1d01639e2db7401a
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=the+crown+season+3+episode+4+reddit PDF link annotation
    • https://cdn.sqhk.co/zaxuloxedu/hggiigd/equalizer_fx_pro_rexdl.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/55015710370.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/kggliej/1068069737.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ifIssJq/wigujepim.pdfIn PDF document text
    • http://itactical.xyz/eso_solo_levelingok6m4.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ig75VHj/takeout_restaurants_open_24_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/fenajobuwer/dhajiIb/game_of_thrones_cast_season_1_robb_stark.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/jfVFQT1/gugufufafupa.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/f2FHykr/gepogag.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/gcUjbgd/does_moto_g_power_have_wireless_charging.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/5302860790.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/cqjgQhh/wings_of_fire_dragons.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/aijegfG/22219800365.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/gjiggfd/22814035217.pdfIn PDF document text
    • https://cdn.sqhk.co/padumaxifop/jiagjbS/56151282550.pdfIn PDF document text
    • http://okstore.info/bard_s_tale_trilogy_stats_guideo04z7.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/hL2hbhx/browse_the_dark_web_on_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipagepe.atwebpages.com/astro_a20_mic_not_working_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/android_10_call_recording_root.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/they_say_i_say_download.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/vorowavituwemorarodalugip.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/airdrop_photos_from_android_phone_to_mac.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_off00014984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14984 5424 bytes
SHA-256: 6ed416f3073e260928baa0a9f3cfd252b2d851ef890d8dcc5d6ae144e02e886e
font_01_sfnt_off00015c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C05 11992 bytes
SHA-256: fce7f7ba3aa43c50362ff3a616b54e7c6c15cd57a862f16700e348d5a746ce17

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