Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da63a32c88b8e49…

MALICIOUS

PDF

89.8 KB Created: 2021-06-10 12:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f965b069b0edca42fdc3f486dce91709 SHA-1: 17d87ad1c37a169d3ab5e5c873a3ac8d93c1fada SHA-256: 3da63a32c88b8e497e21b43df1230b31ddcaf72e3ed91377a8a7d22f076bb925
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential tracking mechanism for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8017

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://allytemp.ru/uplcv?utm_term=ladybird+free+full+movie PDF link annotation
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/526ca29d95955d58bc1c49828814160d/41986279677.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/wezexoxexopuxajetozunedi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/31ad4d32e48d8c16650ab9322aa8d38f/42482365840.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c9000c00---29590324556.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077adb3ec07f---56959589418.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/89a798b53a36256250b70e8edfc0a77f/labelevebewap.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/osh5cmans6ct3rsje0akbd8hdm/61443909972.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/toxojamoxogatefuluxopupe.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/fifonirelilikuzadigizumuf.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be75d7b828---16495034414.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160888f54895bb---11032055537.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160822deccdc97---43999933144.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f14cb29651---dewepovedifo.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c453d3d8cc---xosugetafinimoriruzajuw.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d599bb50ed---89549472071.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/fd46d892d040149eaa961461d2734b53/92880663818.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11392 5116 bytes
SHA-256: 5e45c1abfb4279dce88e8042a64cd22c600b9263ac235f75f7df1f7186276875
font_01_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 3008 bytes
SHA-256: 2a8e8ebda00d8ca081ee66bfbd40e96597ca670b9087c3d7f8978bafc62abc71
font_02_sfnt_off00012f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F36 12168 bytes
SHA-256: 1f5213b4009187fdfb709189d7d70b33a82e23137855dd5b47fd83aaf2366438

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