Malicious PDF — malware analysis report

Static analysis result for SHA-256 0655bd7d2ee9d0d4…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 02:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e3231b3e5635d8ecf2e8144618f801aa SHA-1: ba8f0cfe007085b29a72c3b072051e4e42f905f7 SHA-256: 0655bd7d2ee9d0d44b80147561c69083d6af0fac37266ceedb866e0d94cbede4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users to phishing pages or download further malware. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6aea1a6q1qvv98r4j43hsu0ijq/91390161513.pdf In PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/95799965713.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a2917504604f3f36ece1aea69d2aebb9/fafonuz.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/zidozumed.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/sipuxujifatubozafeja.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce1b9064f7054d3b335ec13677862d99/waribosolud.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078c14a9ed92---lopegup.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5f0ab981---dajezubimenaj.pdfIn PDF document text
    • http://brukbet.com/user_images/file/65805561639.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/39386932975.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/waromadi.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de596230b4e---norat.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/93461545826.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/wajumowa.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/nemotepava.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/befipameturukesuwusugit.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/35584809356.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/51600010165.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/zanozefofigivogukodemovo.pdfIn PDF document text
    • https://slotpt2.com/contents/files/34345285864.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/c26ac30faeee40f75867ff94357e30ed/batasaxit.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/d61f3bffcedc0ec21389a7b20fc29e68/17582649666.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/dexapopemefivaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=fitness+and+nutrition+journal+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC8 18160 bytes
SHA-256: 9cedb0e9439e4fd9c052ca20b34c8efe191ddc2479513c5a794b6eb98d996c1f
font_02_sfnt_off00012d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7D 10696 bytes
SHA-256: 9093a8815e670063db0a1f62f92d0a8a496bef236a4800f639ab2da8b3030de7

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