Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d8433a53c63db4…

MALICIOUS

PDF

87.0 KB Created: 2021-03-29 06:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74409f65b6aaca1321af7e69c46ac1df SHA-1: 54fda7988e3c94af96a4f4fd5a0df3557a155fba SHA-256: 66d8433a53c63db411539a5a4f25dd7d1abe4ada0e79d8389970965b0e4851cb
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 0.9967

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://jottigo.ru/wix?keyword=shark+rocket+deluxepro+ultra-light+upright+vacuum+review PDF link annotation
    • https://cdn.sqhk.co/feguzuvubut/gOhhmR1/tiliwafi.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/36779739430.pdfIn PDF document text
    • http://vedice.ru/cursos_de_ingles_en_miami_doralfw72k.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ehiiWe3/weziwobe.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jnf9PEZ/2599839297.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/biodiversity_conservation_strategies.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/kb33hch/lg_v40_thinq_specs_phonearena.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/jUiigcU/nigomunubew.pdfIn PDF document text
    • http://mugedly.xyz/modern_house_minecraft_pe_map_downloadbdtyl.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/f7jd5ie/28016584021.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/dmggieO/bacon_escape_2_apk.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/87601582332.pdfIn PDF document text
    • http://pro-komp-master.website/58570146533sbzdl.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/Bgdhfid/xobinuralesikeduzet.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/5hcDJL5/transparent_screen_app_iphone_6.pdfIn PDF document text
    • http://lafutib.sportsontheweb.net/xipodekulitovujujabuleni.pdfIn PDF document text
    • http://copyright-rules-help.com/620562432682dt34.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/poguvelefa/free_sap_accounting_software_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/wisekefipemamisa.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/gold_brick_guide_lego_marvel_superheroes.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/45632120610.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/pepoxupokel.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/vawepisolu.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/chemistry_density_problems_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/ddu_gky_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/bamboo_pen_ctl-_470_manual.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_off000114a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 5728 bytes
SHA-256: ab87160b31f6a2be321aa79c0533b28bf3a7210c84c9937ebd56d1150a137ebe
font_01_sfnt_off00012813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12813 11112 bytes
SHA-256: 44627113a190c4026449501f850c949e3f0a5c0679ed1d1d5ab626fa88d3d321

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