Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc05ac43dba33e62…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 07:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0c9044dbf3d0a99746c04e30c0675cfc SHA-1: 5a80d739dde01d550027cc370e74e8cb67ce412a SHA-256: cc05ac43dba33e62e88118c4bc903e06114e639501a0b782fdee9844b514e8ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://mygoaltv.org/ipp/images/uploads/files/92931188852.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611965d61cbb9---pejaxozaluzomipevadisip.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/bajonubigazevulu.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/15471038359.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607989d648c16.pdfIn PDF document text
    • https://agatanorek.com/files/file/12261639559.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ucd5jd3o1c9evgvrcv3fq01fvc/80164337796.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/retimoxurezokinune.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/29872543731.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea9928ba3---wigejumobu.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/82235716572.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/josogegesaruwadatavafuga.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/786db58c77431c7e98cd6a0170f96e45/xekikarez.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/semodexot.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/rsvj3qmkjdd5gr4dsenr6rdvc5/vigurarosanuvutukezow.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ilid3hp7v5sv85rfklfei22js2/lagewa.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9ba062c52e5326d9971888d134f79b6e/zexixativijodozonog.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/94070696048.pdfIn PDF document text
    • http://toonesk.com/upload/21455848270.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a289c11ff1c---boravukedukito.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111e39e55633---4965729917.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160928f0c76a22---61158385143.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f00917f0006---buzububaginafuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=conceptual+integrated+science+textbook+pdfPDF link annotation
    • 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_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 18116 bytes
SHA-256: 592cfff68ac1af7eb86cfb594bec6967cc717b13c174c3b30960924eb9c8bd4f
font_01_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 11260 bytes
SHA-256: c2d4a684389a40c18dfab0fcbffea06e2158e9cbafbe4283bf5b281cd36d57c9
font_02_sfnt_off0001248a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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