Malicious PDF — malware analysis report

Static analysis result for SHA-256 866091c599377fce…

MALICIOUS

PDF

102.8 KB Created: 2021-08-05 19:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 96b0ee366ee2a16dcdfa43d4e1ef6a89 SHA-1: a5f93d0a6785b32b9928138efd046117dcbc4a47 SHA-256: 866091c599377fcebf720c3b9ad8945ffab82b9c7558dfe86e42fcce8329410d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites, which in turn host other PDF files. This suggests a link farm designed to redirect users to malicious content, likely for phishing or further malware delivery. No scripts were extracted, but the structure indicates a malicious intent to lure users to external, compromised resources.

Machine Learning

  • Nyx PDF Classifier clean score 0.2180

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://laborke.ru/uplcv?utm_term=marriage+resume+format+for+muslim+girl PDF link annotation
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/4ta8iqh92m5gr3loci78n3l5ng/vogowopedaki.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/61bd1c4178ccc379c2b9808666d4000e/95351196392.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1ccbfd14---bovakegudanilum.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608033db34859---72614734715.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6121ae4857fd5315b8c0ffd352362eaf/lejogap.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/upo91b2n9f38sed4ir487bdj4k/41172411526.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e39a5b824---lanosewabujalikari.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/23873860244.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/gabadulam.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4043ac2e945f64c96da92a74ac9e344d/67021487855.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/79461999125.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/3426802330.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160820c5ed50c0---vujusorategerovodoxar.pdfIn PDF document text
    • https://virker-ikke.dk/files/2923087930.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b0b493bbe---65765474241.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/94322429161.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/vikopazobeko.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tadijafetoletiwemulutidi.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/e68b3d597f577fa758184c95a4cb2520/37333858982.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7d6e386c---11063431002.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/fulodutodowawizonarim.pdfIn PDF document text
    • http://inncredel.com/uploads/lapemulerenajapawefegig.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/gekuzigumukepenunolu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/07b2a7c8463718b23172c3ab3c4ee5b3/revugopizazavewol.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/55466925552.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BA 10544 bytes
SHA-256: 3e49028ac237d39f6cb8a9e90a5d960263757c25a8557740b6e08b4f36d2ff23
font_02_sfnt_off000150d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D1 17656 bytes
SHA-256: fc47798e54755aaa17335a55e7b697a4eae72803a0e9610f344c3bd59035a45b
font_03_sfnt_off00017f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F52 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516

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