Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc2e72b8e5f5dac…

MALICIOUS

PDF

78.1 KB Created: 2021-08-01 06:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a944e68707001d465eeeb134abe1cac9 SHA-1: 91d6de5d2ebb6f9b97dc197a2b6d412bd977f8c7 SHA-256: acc2e72b8e5f5dacb40a4cae28c5a45124f8372a011cf1c46d21ee506cb15b83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5182

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://pelesiuvalymas.lt/i/File/39703823754.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608169d333e26---56999963247.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b810ae2faa2ba0432161c07b0a43a25a/tirogikemukapeda.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/wasirorejerakidogosa.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/wujamakopu.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c1c9bb67a29e085bfbe34adfaba4f5a2/vusowaripuwakadekifuno.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/49318583579.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/15378133882.pdfIn PDF document text
    • https://rjpexport.com/files/19223512731.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/jewerifivi.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cfd6c9ab6---wulosu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1ad441c6e---baluvapiwusumedazat.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/188599195504fb96fd51f33762651c4a/30150034901.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/94767367449.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/tuzaxopaluwuxowevarikexe.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/nuwamasotikamo.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/36995264409.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/bb1df8063aad7ce48f850af5ec5a6ca8/vizeboxureva.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/98297868250.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e69833cc743435a76fd2dded32869da5/zosafisaxu.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/83865293408.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7f26000f21726ffaeab3dfee2ebc32f4/sodobikosite.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/99613497925.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/10284940660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=como+hacer+un+pdf+con+fotos+en+el+celular+iphonePDF 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_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 11016 bytes
SHA-256: 81bc368d319cf95e79c988f14af9bc71262a068786542e13f53346ea77037949
font_01_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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