Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef9c1cdfa91ee58…

MALICIOUS

PDF

64.0 KB Created: 2021-07-05 10:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: fa7cbcb5e06725a0029c518ab7fe58e4 SHA-1: cbcc89021e095a5ace6567271461d64ef93e13a1 SHA-256: aef9c1cdfa91ee58ad8aa3442c16258ed811581d21f19d1bd69c4a0643184d63
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised CMS upload locations and disposable hosting sites. The embedded URLs suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6378

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://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/7d016b53fe79ccb6fc623864db591b90/nagaforisibumiduzumi.pdf In PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16076d5feede48---rawixeme.pdfIn PDF document text
    • http://delve-cr.com/uploads/xazabutim.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/71k888o686hfutcudqkffds0mp/44601317179.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/r6e4nfc5nud3v1a60k7gh9078n/49656728790.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/40c9f6327ccb7e4282de7b83f633bdf2/palesatimagevej.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/kafidoxalom.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/zoguvigewamisunobesilafot.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a4968edbd---36770481554.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/85ef5cc910f4a2da1525c0cd3c067c5a/54207285696.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607486cf0f057---durapubawubasasadibatat.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-25/20210625212143839575.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/gvamm5gbqcrn8pt5c9584h93oa/74838550254.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/wukuvevenugatikuk.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089fa4c2f720---77030772086.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac508f8d180---67020215185.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/42779324095.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a372413a5b4---70378409988.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/lerigewowipuda.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/563082678b7d1436ef1ba71b1ff47ae8/84779826909.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160decd293ee1b---tunovituveziwosokumu.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/585d1c08a819f2194b51ebd6d676acda/99738858070.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2f20f3acf94121eadb50074c9e08f727/63208356520.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffca2e480---679154892.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/pozejamefadolo.pdfIn PDF document text
    • http://imaginove.eu/data/Files/nizezejamusuzizesabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=a+good+quality+anti+a+antisera+titersPDF 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_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 16224 bytes
SHA-256: af31a04d1eafe20aeb743af5c1c1cd4f2c2957d814fc457315e176f34022be1e
font_01_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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