Malicious PDF — malware analysis report

Static analysis result for SHA-256 4759d2710c9cb6f8…

MALICIOUS

PDF

70.3 KB Created: 2021-09-05 20:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f767331e0a344234bf7ffc1164ad3864 SHA-1: ed2809b71ffadfe423c41058e396defe407cb517 SHA-256: 4759d2710c9cb6f8a973370a31e96825bb4a0089ddb7a41f5fb1c25e02529062
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. ClamAV detected this file as a phishing trojan, indicating its likely use in distributing malicious content or phishing lures. The presence of multiple external URIs and the link farm structure strongly suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

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://bem-sa.com/img/file/71977256496.pdf In PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e723ab42e0583fcf04bb687237f54474/92657324783.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b339e3fb2c---gezapobepu.pdfIn PDF document text
    • http://freeski.hu/freeski/file/60666662666.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/46401968921.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/i1g1gikuibcim74h4afpm3cfb7/75509030597.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/wosikelenabarewo.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/kuxuwevibukotago.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/208052727.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/21775802669.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/71920424434.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/55036932461.pdfIn PDF document text
    • http://ranch.pl/files/file/94022395395.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/21011676625.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/fogusinodasu.pdfIn PDF document text
    • http://jentretiens.ch/uploadimage/gimujog.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/zoxed.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/aii1vqt31bmjh8ekcbrlk0mkej/bomijopivaxamuzu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607642b0ee913---gobejifuzefimuguzog.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/14858474793.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4eece6e26---duweta.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/momesibejalasavi.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/duratuwiseve.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210812/file/16287298633502.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/10463069934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=britannica+illustrated+science+library+2013+pdfPDF 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_off0000c7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 18340 bytes
SHA-256: e9e394866d0b1924d0fcfa7c2d3cd68f80fc27907ed066458f89fe1bd6b3a3f8
font_01_sfnt_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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