Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd62f65007ca66b…

MALICIOUS

PDF

72.2 KB Created: 2021-09-04 02:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 392586dc567549803b0b815f0c5b331c SHA-1: 79633d2d325a12ae3d6ab4726a0d6717b3d3431e SHA-256: 0fd62f65007ca66bf11766284f46174e61bf78da19b9953b693a7a0868c8d5e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to exploit user trust by presenting a seemingly legitimate document that leads to phishing or malware delivery sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=planning+steps+in+management+pdf PDF link annotation
    • https://anandamsanyal.com/userfiles/file/sixegowevaxow.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cb8420ec---xiximefam.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc373826cd4---62375079539.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609876098be69---38172599758.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/30474259562.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/liwepimabaj.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744c0a6d833---45836962289.pdfIn PDF document text
    • http://thepducphat.com/upload/files/puwagefisalixozokinam.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/wowilavagu.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210803112502.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/0lmlgncu8lvvtv0km37lg5bl40/damatekupeje.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/19932436936.pdfIn PDF document text
    • http://coumert.com/images/file/40814201777.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3587cac91dfdb87255ce162ec86e2890/xufax.pdfIn PDF document text
    • http://kco.su/userfiles/file/walukerarejepubarinujex.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/2596795337.pdfIn PDF document text
    • http://meta-min.com/files/34860833511.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/gusizitanufezujuduzun.pdfIn PDF document text
    • https://soechi.com/userfiles/file/kukarefenivu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096023865764---nivosegobut.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/gelojevukafudalol.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/makuruf.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/53241487625.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_off0000b993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB993 10620 bytes
SHA-256: 61f416678e9c2b214f064a54066164ee2873296fef3fb1e602ed5af0a598f68e
font_01_sfnt_off0000d197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD197 16160 bytes
SHA-256: 615f8897bdea06d6eaa3af5ce0520b8ea5fd4225ba7ad09c02a0a2c5caab6654
font_02_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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