Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d70c2c388ff4d73…

MALICIOUS

PDF

93.8 KB Created: 2021-09-09 07:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cc073e7b351a7cf6ee1aeb12edd3b811 SHA-1: b0eb5bb423f2ec7a931dabb8954a35ba12569858 SHA-256: 7d70c2c388ff4d73c237d4d9d4e697b893b82c434795b1c01c355ce8e36e9512
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate it is likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=boruto+the+day+naruto+became+hokage+full+movie+dubbed PDF link annotation
    • http://cameranichietsu.com/luutru/files/zobilasexo.pdfIn PDF document text
    • https://shinaltd.ru/images/file/26922593404.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/28796658041.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/linixava.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/82834281894.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161393fdb549dd---28944082398.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d1e62d90442318af058651448c28f80b/75901521611.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/45700578576.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/zonabowisuwivonok.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/sasabuxuxepolutu.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/kirukemevirifudib.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/63859870661.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/84292147650.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16134dfc606e88---44081670733.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c210946a4c08421ce25862c3e315c8c9/45326845416.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/xapapogoxurolaguwudepil.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/lumotaxelami.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/21001138236.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/fopiv.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/63895246127.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/vuguboditogaxezudino.pdfIn PDF document text
    • http://zgic.ru/!upload/files/81560564547.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/18188f7c3d5205b714b39ff9b0c89a2b/23119089371.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://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_off000103d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 11320 bytes
SHA-256: 158727aa997ecd3a2f34b26cf0e4de7e23e81d867aa65ea118fe4725ce81417d
font_02_sfnt_off00013634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13634 19584 bytes
SHA-256: 0ddfd49353204d262aaf109ea20b56488741ec6576d536b4c39fb1c91be9b48c

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