Malicious PDF — malware analysis report

Static analysis result for SHA-256 655372da412a3f08…

MALICIOUS

PDF

83.2 KB Created: 2021-07-07 05:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e73baa00899dc033f573502b41391de3 SHA-1: 23aaae83526575e88faa5ba55d418dbb13c11430 SHA-256: 655372da412a3f08970eac526d0d5ab657222700e7339f67e5aae05d6f6fc2c0
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 0.6272

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://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e35322fea84025eb9380d026c1fe697b/robixokemosenezamigi.pdf In PDF document text
    • http://i-dron.cz/data/file/degurer.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607975194d4b3---gowuxinagafagitez.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/fuvaxe.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/lipij.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/gelirogusur.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ruik17be9f1ethaah3uifghik3/zovejovofalipagafowexune.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/32c17842de080b1f7261ca3e7eeadd7a/75915900385.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24c88a803cb1826acbd230865be62f46/talijovimidu.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/zoxafijewuwapeligo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe1cdd823---56515333572.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608477df5611f---radogitidewovometox.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dc4841454---nolixawinojazorolowomoti.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/musifabejeluwiref.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/5jveh8fve2853lr6elsbr8bsv3/sodoredivivu.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa875f8bef7---fovajabufesegot.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e43884b61---60492901567.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/39986874986.pdfIn PDF document text
    • http://vieclamketoan365.com/upload/files/fuzosometuxowigu.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/3430fa120acfd0f891b4f1364d0187af/28790355594.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/6ecdpgtk0kidba7bghlol7teqs/13741640173.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c05170868728b0f14a74f9af238bec3c/sisubezokerukuvokaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=apparently+with+no+surprise+themePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/gekifudus.pdfIn 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_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 10800 bytes
SHA-256: d8a83641f975ea53bcb00fabc816c21247f45cda4222604a315b680ef13932ad
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 17516 bytes
SHA-256: 22706dac01be1cce95d2555e496820d76c32eda0897af8799bec56501e4fbce8
font_02_sfnt_off00013162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13162 4380 bytes
SHA-256: ff458cd0b613a872c30553077e7cb8bd24ca86ae15101b0d6cfa52379e10f770