Malicious PDF — malware analysis report

Static analysis result for SHA-256 baef3de2305d6901…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 17:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 851490091e5504417d97c148ff9ca927 SHA-1: 8ca09dedeedd6cb512f1327cfd89c2b081c26de8 SHA-256: baef3de2305d6901daa0c3588f55421c16eaf3df946f24be11b3d9ada208ae94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. The document body is heavily obfuscated and unreadable, but the heuristics indicate a lure for downloading software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

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://inwebjor.ru/uplcv?utm_term=download+ghost+radar+for+android PDF link annotation
    • http://zgic.ru/!upload/files/36807834339.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/pobojobugagipejes.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/stdf3iamornp819udns9ke4jt4/luvegojokotaridoli.pdfIn PDF document text
    • http://zae.me/datafiles/file/31347920283.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161358fa8b3f72---xokirufebopix.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/nadasosoxapixuren.pdfIn PDF document text
    • http://shesob.com/file/files/volevisisego.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0aef7c30e---1689643962.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/63269825161.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/13324613932.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/53218027961.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/53114912320.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/bojili.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/6261697484.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/nugebeganaw.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/63486079724.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/gezolima.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613db85fcca0c---24033413970.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219151419523672.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/53058523854.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339a021f9c2---85422549429.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2cba1e3969bfae0d270ef72f71f79d62/8927179281.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/83446138001.pdfIn PDF document text
    • 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_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 10588 bytes
SHA-256: 812ec344f67fe14f315e0d6d54f346587a7542523af09d402ed03ba0e027bcc9