Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab483301d98e585…

MALICIOUS

PDF

91.6 KB Created: 2021-08-05 05:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4dd74177b2e03e80b35bca0f2597242e SHA-1: 514b7fb80c1e54334e615f446845d6dd8a51f8d7 SHA-256: 5ab483301d98e585fe14c8256fc9d320a96278d49b70e95607fd2d6451994718
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick users into installing browser extensions or updates. Several URLs extracted from the document point to potentially compromised websites or disposable hosting, indicating a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://kcde.kr/userfiles/file/suvewusulutepudateno.pdf In PDF document text
    • http://caphegiabao.com/upload/fck/file/wixasofoxifep.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160749a54cc953---lorakogukolo.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/66572926685.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160efeb6650b43---bijudinamujul.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a002594d438c889fccda6a3bbab6f1fb/nidusafun.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607276833ff62---guwiliziretudopepun.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/vezibadixusitenidoxone.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/855f802a71c3d0fe29d6e96f5bc1c9e3/52514091865.pdfIn PDF document text
    • http://sam-global.info/files/file/79138343600.pdfIn PDF document text
    • http://cichanski.com/Upload/file/rirujomivoboxawonukufowo.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/kebuwowadepigemugi.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb7de40109---nuxudujabogeg.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/42247554049.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210726044320.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/l0t54879bm8tceq6errqakrtgf/44029584287.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/melewezafarawede.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9034bb169c---59256408126.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/duvasipokode.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mpj4c47leb1ed18nvfpdka5lib/91160777009.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/87714082327.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/3ab4373ec014bb33c4231c21b137e0de/9840678832.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f4fe1d14---didopuloburapezedarob.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/52782075898.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab350353869---basapudavatokesorakud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=krunker+io+hacks+chrome+extensionPDF 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_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 17080 bytes
SHA-256: 61486b23f4e1e5707780979b3aa6f69acf8866ed7455e457c389041a8e82fcc3
font_01_sfnt_off00012e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001461f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461F 10732 bytes
SHA-256: 54c8d5cb61b85cab18afd891f1cee99ed5a5584171068d512142c15fceee5355

Open this report in the interactive analyzer, or submit your own file for analysis.