Malicious PDF — malware analysis report

Static analysis result for SHA-256 5928589d7f4f93a4…

MALICIOUS

PDF

74.8 KB Created: 2021-03-23 18:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a071a3d07b5ca8aa1d0f04b195c672e9 SHA-1: 8c593e13431a7343fb47baee016861ffa00e5471 SHA-256: 5928589d7f4f93a4bd137824e4c188693aabf0d9a0c60dd2f2fb5867f1bb78b8
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 0.9997

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://resalured.ru/strik?utm_term=bushnell+scout+1000+arc+instruction+manual PDF link annotation
    • http://fusavexupisedi.iblogger.org/bluetooth_for_apple_ipad.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/70697391081.pdfIn PDF document text
    • http://deine-gabe.com/squealing_noise_while_driving_manualdbr4u.pdfIn PDF document text
    • http://belkwigs.com/garmin_gns_430_for_sale21exf.pdfIn PDF document text
    • http://hookup757.fun/anime_guitar_games_apk_downloadevzu9.pdfIn PDF document text
    • http://evromotors.net/tamudalizagidajiviyux5.pdfIn PDF document text
    • http://the-english-temple.com/rezipos1hsi6.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/fojubizesd8r6d.pdfIn PDF document text
    • http://datab.vip/76926624944kvvyj.pdfIn PDF document text
    • http://lirituniwati.22web.org/cisco_meraki_firewall_datasheet.pdfIn PDF document text
    • http://kinoxca.xyz/craftsman_yt_3000_blade_part_number9y8ih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_6adb60271e424e07a0f431e533b6e1d3.pdf?index=trueIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_53541e964c18450eadbb9a09c69a543c.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_f5590be47c214d74ad222e1dd2dcddfc.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_cba326c86a734f8c987bb5ebef316475.pdf?index=trueIn PDF document text
    • http://duwemanuwixam.atwebpages.com/39106846336.pdfIn PDF document text
    • https://e62d90d9-845b-491d-b9b1-804d55ccd6e6.filesusr.com/ugd/6af1ed_73106d0259a04c238260769f7e4db2bf.pdf?index=trueIn PDF document text
    • http://nemogijikipa.epizy.com/super_mario_bros_2_3ds_online_multiplayer.pdfIn PDF document text
    • http://makuvekate.rf.gd/how_much_does_it_cost_to_take_photography_classes.pdfIn PDF document text
    • http://zamutodud.rf.gd/sbi_bank_clerk_syllabus.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_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 5280 bytes
SHA-256: fab24dcab7ecd9e600432fe230f7c634dcacf7e3a5a372de095fe3a4a344a00f
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 11884 bytes
SHA-256: d4bea0e1c9ad422b34b352a7349e4fc9074bdc88b51b683fb333553abac9cc78

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