Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1f48b376fb13f0…

MALICIOUS

PDF

88.7 KB Created: 2021-08-17 01:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 7772c158d539043e9c416d36666a72b1 SHA-1: 79af1dc5a7bc4d089e04843044882df976a459ad SHA-256: 2b1f48b376fb13f091577761c90e1c6cac09472242d3fd8e6e62b798a2a4d55b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript 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 0.6449

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/drdt24rt5un30oc3fnb8fsjc85/89864962465.pdf In PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/30965421085.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/denokasufodugawebozixon.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd82464014---dinenowudebopixuf.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/45943488410.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/pabupewodozutitasotixi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070609202b5e---fapoforizulomopovigonokut.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/073ca6ef152dc4a5fa083203aff05ba5/majoj.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/fbc835cec3e03f9d82a7621b33e9690d/40427000176.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/8685330084.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/63040334033.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/20285488776.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/jexajuvubitoboruka.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072b4ce0fd92---jopukufuwajoduretagi.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/70388627081.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b761f8de63---voruvovizurevijiwafor.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/73795859609.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/68244655624.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/47313210501.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e61ae1f9f549e43fa582bf55e64e5f4d/74330465712.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160984989f1b2c---94248978125.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ihungim4ld5bd9h2of3neoo931/pumovugufuboluvuvaruxilel.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/tenow.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/kanogivapazejadebeloz.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/82996963805.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/fiwarovalagujuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+program+my+directv+remote+to+my+soundbarPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10186 11308 bytes
SHA-256: 65dd40e9fab6db0b24c482fc01a4a39eaca5ef818042423aadb79cf92efae6c4
font_01_sfnt_off00011bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC8 19084 bytes
SHA-256: b7bbd0a0afde128c590179b20144114d4767caf51ce495f6bb9e0bc3038dbd2e
font_02_sfnt_off00014d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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