Malicious PDF — malware analysis report

Static analysis result for SHA-256 63831edb05def361…

MALICIOUS

PDF

90.0 KB Created: 2021-07-21 08:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95ac1afecb210d7af7f76d0a02e2c4ba SHA-1: bf02bce2137b0747838fc22048b2dbbd767e5bc9 SHA-256: 63831edb05def361a8c1e84791e58c5b5d2ba4d6f671c5d371e6a32bcc112625
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories. These links are designed to lure users into clicking them, potentially leading to further malicious content or downloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4575

Heuristics 5

  • 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
  • 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://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/00kufisemndasmg3g4ejuqrp56/zosuxesujopapoborivupu.pdf In PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609879ae5e06a---nuvixedozopudagagavivij.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/18069879723.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/tezigiti.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/17397694010.pdfIn PDF document text
    • http://metallpress.ru/files/38000718509.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/jetajadaji.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd433a1b34---menusedaziwugoxukamo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae216a3400f---kiwopusipekedovak.pdfIn PDF document text
    • http://mega.kz/media/upload/files/fexakomekibavezifa.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ni5eisluj3eglcoui4vrubl4a5/48818804758.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/dipokajewuja.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160890d0180732---84159846256.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2417ddcb48---jokotijefodiwitudala.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///39537835855.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1efd725043---rexep.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/49797553220.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/6485c508ba496f6b674ead45c0fb044f/nufatadulomirowiz.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/29574333454.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1eb97807baa81a5241695abcb537e03d/20421001363.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210628091650.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/tpgdn50lvgvc3o53qhf3vnt1v6/pefarepugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+the+valley+of+ashes+represent+in+the+great+gatsbyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 11092 bytes
SHA-256: 20671d7cdc1baee038c1fdd21167db28bb92de1587b6ec6840e347c72f289a8d
font_01_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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