Malicious PDF — malware analysis report

Static analysis result for SHA-256 707fff52dadb7400…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 22:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 50074728b54c617474541f6410f9090d SHA-1: 659de1b2db22caf0aebc2cf70fc7f04cce1c9c1e SHA-256: 707fff52dadb74009693d5482d918b2f9cfc8bb2fd189a3a531c222c81357ba7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3497

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://dolupin.com/calisma2/files/uploads/gepitegepiziwutilemaloge.pdf In PDF document text
    • http://ck-buhgalter.ru/userfiles/file/8890794946.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210702141233198.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/36fd8a945c5295138b0b466be6e4bb8f/nelolivimujoru.pdfIn PDF document text
    • http://unseretochter.com/images/file/6159174964.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/40626223930.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/56390816527.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/musorifeton.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/86289d2cbfddab6a1b0e189497f8c200/28301158107.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/vususizonutinux.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f090039ea4---97678110180.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086f278d379f---daboxigugesunilewem.pdfIn PDF document text
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/41372254841.pdfIn PDF document text
    • http://elpijisystem.com/file/5596428774.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/rerumebibun.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7lgrd2sssakmhshh9ctri162d1/fafamepisirurusabo.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9b0b9f56361e64d2b9acc813831d3231/davupukominujipozob.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0f89d38d---vejitoreti.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woxudusaxe.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/nosurujabamutuwasisoj.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160983685dcebe---kekonirokoxag.pdfIn PDF document text
    • https://giustofiori.it/file/joxodivosalozoz.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c01f64975---xaxopodezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=volleyball+training+program+design+pdfPDF 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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 11064 bytes
SHA-256: a6a3f75f9899bdbac141edcc040ea10ed8564e6a5c86d2c9f4ecc124eaa3053a
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 17372 bytes
SHA-256: 66662cb61ebe43aa7935e30f5bc2e61d117a916650f7962be52dc7263f352f93

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