Malicious PDF — malware analysis report

Static analysis result for SHA-256 f473c2b84f5d98f5…

MALICIOUS

PDF

111.7 KB Created: 2021-07-21 16:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2c7005dc613bc8fdb21e5c20a9d0edad SHA-1: c548b3f25e34807d1e5dbf6bd8ae5f6438a20cc4 SHA-256: f473c2b84f5d98f51563b4a1708ba5be76329776739e7ce8f88963a77543e350
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4271

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 http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/98317649657.pdf In PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/24da5918faea89e09b8e80f073a56daa/42891299384.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075da12516f3---jakotuzesefixukijo.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/begefikakivilenawid.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/nuxubazexaleladinas.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/warutepudibavoluf.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1312308114---wipofowal.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ed4960cd6fba96a05472243a8e662a4/11331964142.pdfIn PDF document text
    • https://lasanisports.com/files/wotuwiguxasofi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d395cbf2fbce2cebcd8fdd75e2376bf7/darufaputu.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/lakixadirarit.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b0d5cb92d---zakidutixemufuf.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/30614751741.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/bivulikolixoz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c53d547489a61589aa859b2ff4f044c4/tasazexifumijowosenobij.pdfIn PDF document text
    • http://techbis.pl/files/file/wuzawawuputujapavuzuniv.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/11685217461.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16081af2c4e0ba---11318860103.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/7kg32c7qgjum1gqvif9pd94ara/57345731174.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/4615fbbbc47796850cb3cb49ab7ba6b7/migeloxiwukirogig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=research+methodology+in+architecturePDF 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_off00015f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F08 18276 bytes
SHA-256: 7cef63e0ba6ac3f4270a715481b7c04250cec2a9d16bb643cfa76864af41d7f5
font_01_sfnt_off00018db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C1 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb