Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb1bb9f438cc61c…

MALICIOUS

PDF

71.4 KB Created: 2021-08-18 13:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 2ae6e176fe03d6d2c1f925bbcf7f5806 SHA-1: c264b085c1181995b5fda6ac27bdab808703eda5 SHA-256: cdb1bb9f438cc61ce2210d28f7a98d061e6d2637358ea605cf001f1dd46f65bf
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 0.7024

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://thecrayfamily.com/clients/36408/File/subijegarado.pdf In PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/c1b8390fb80c321900c1d770e8c4a15e/22172791196.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/47207610090.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3d9971ae---ravak.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/tunenijuxelakinep.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/vugowuwixesageneruwadawak.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/0d1f75b4c9580d7e1425bb4a824a2353/32315773265.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9dqgkjln3d4j272ndrcht8a2c0/zifikutetoruvunakanix.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/16899884890.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160743e18b6b9f---40867993604.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a051551d326---12206323433.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/buduf.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/49127860854.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/6702683846.pdfIn PDF document text
    • https://ms01bet.net/contents//files/rubisodemexasoxuvirosi.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1628757961.pdfIn PDF document text
    • https://lbassicurazioni.it/file/kiberovibutixikegeje.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1fcfbb80e---xomatinuniselixowur.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082079f1a143---15043719333.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cc397d909c602002623359322f4ce475/35619373185.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4909cfc6---10545291206.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/xolilitigude.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160710790c2789---jamemefubobetarila.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/70561695148.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce774a80dd7---80088477193.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/dukerasaxamupajitapigamej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=simple+interest+and+compound+interest+formula+with+example+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1