Malicious PDF — malware analysis report

Static analysis result for SHA-256 501432566548e740…

MALICIOUS

PDF

79.8 KB Created: 2021-09-08 20:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d46a6b04bc74ed1f8af9b212ea1b772 SHA-1: 534d081a35d7834b822857ddea611bb60852246d SHA-256: 501432566548e7408973cf3107a0deccdf74a45394d6393b04d99b0fc3d00d30
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of a 'lure' heuristic suggests the document is designed to trick the user into enabling macros or editing, which is a common tactic for malware droppers. Several URLs were extracted, many pointing to potentially compromised websites or disposable hosting, suggesting a distribution network for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://www.jindatunnel.com/up_files/file/72159228301.pdf In PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1612f138de0b4b---zokilem.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/3184106240.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/83477594159.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137d8a585270---xibup.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/turarujoloraxavowiketo.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/gc4n8k0ihjaq9th7jo8ahvg9e7/92911363790.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/jimibewobapogejaranaxo.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/wamibuli.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/7248067980.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/napatebaselowozeras.pdfIn PDF document text
    • http://wohingltd.com/userfiles/mimizanubinumapa.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/484dd75a776f315a0016586bbf48cb0e/41717965339.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/wexirafavegimozugo.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/12634151900.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/5198457279.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/xekijuvebubenepak.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/33501242393.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/72468676359.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/28232879643.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/nuxikakusufegawuxenuve.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/temarimile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+conversor+de+pdf+para+word+%2B+serialPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 10668 bytes
SHA-256: 1a0dbd0903b95871cbc315bb51d0f1239057f9d22e6e462eced13bb2f8ceb1ce
font_02_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 17724 bytes
SHA-256: bd442672403b0a121a9692c7ddac67aac226b6140a6b34dc631a817a3fb98815

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