Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb369acd5a89415…

MALICIOUS

PDF

81.4 KB Created: 2021-04-08 04:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9744545d8a31bee7f5e4e02bcd3d47d8 SHA-1: ddaefb0bfb4ae474dee6168239b81743a506e1a6 SHA-256: 7bb369acd5a8941558bc1c463c4e8f7f6e7fcd6ee7d4f01fd9f5be87532d39ca
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 0.9996

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://kuzutuzo.ru/strik?utm_term=how+to+descale+keurig+with+vinegar PDF link annotation
    • http://rezisekuvaz.mypressonline.com/what_is_a_warranty_deed_used_for.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/MPUggUB/mercurial_story_platform_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/jvcjgiL/70647987100.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/63831655919.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/mezabesud-jatibafevufewom-juzobumamoti-muloreb.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/LhiRjje/78896396122.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/4094676.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/a1j5vhj/adventureland_theme_park_altoona_iowa.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/669f05.pdfIn PDF document text
    • http://ru-order-687646765445.art/1150161093994ph0.pdfIn PDF document text
    • http://kind-insta.site/tojegironafemerj9f0t.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/mShjtgh/electronic_components_shop_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_b594743a80104bfdaf0a0ef42c1c969f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/58592649380.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/mepeninimowazibexadu.pdfIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_962e9183d37e4d8a81e8375cecdb77e1.pdf?index=trueIn PDF document text
    • http://lowuguja.myartsonline.com/71223468203.pdfIn PDF document text
    • http://litabasiker.onlinewebshop.net/actualisation_de_soi.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/palight_foamed_pvc_sheet.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/mutewime.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_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 5260 bytes
SHA-256: 9a68ad056c59075ac2309757c529fdc364a51f287220effccd9a8909f1693193
font_01_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 10244 bytes
SHA-256: fadbf65594c16097c72761569efcd4b0c85dae11eb2dd0a74fc193405ff22e7c
font_02_sfnt_off000129e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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