Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fe5ea6248d5ace…

MALICIOUS

PDF

74.8 KB Created: 2021-07-14 06:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d9f3e25c2081ec2b27da1b8efc731db7 SHA-1: 57fd059acec42c4360f9a471023c76e3d31e4ebe SHA-256: 95fe5ea6248d5ace120026225156508e23dcb970db81ef833559f52f596235de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely to host malicious content or facilitate further attacks. The PDF structure itself is not directly executable, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7611

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 http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160844ef77530e---6299824270.pdf In PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0331038f3b1f8b5d00c849a71edb2a41/86432228699.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/89524d487cefa40c27f71f19560c34a3/90195046239.pdfIn PDF document text
    • http://voijin.com/userfiles/files/25418473406.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/g9vfd5d7u4ojho58d6hlbtd8mu/40786034528.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/fenurodeberevobulijolubi.pdfIn PDF document text
    • http://fitviewer.biz/files/file/gezozajivamekiziwonux.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b59fc74e5ed0cff3f9a5c4121dfa3f23/36258269003.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/39255894694.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/bagav.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3a02aded---kuxirezefusibu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/7a43f3eac5954f52f5c843d2e91870d8/sibuwonosoxojijujevasi.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6aa426293daefe288a65aa15abae6f76/1753336226.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/jisajozaxur.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160e7f7f3e1ee0---wevekiropu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/buwifa.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/jusokuzo.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/ma1j0fk8b6qfok0vljmml7pmia/82426681915.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7bec34c4ffc019d53746ddabbc1f4a9e/210734258.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b058bab15ad---vezapa.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8hq4mf6cbjkf9avm02cgd198q3/70654402305.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d216395898---vegivukofasokizisoduk.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/u3j95n9nn5a3ba2u04j5bmjan5/18935394713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+select+multiple+files+in+downloads+on+macPDF 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_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 10860 bytes
SHA-256: 051773c9c1b576bce944562eb48a29e762aabc7ea79c88f73038f8d582a6eceb
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 17456 bytes
SHA-256: 0ccc0b9a44ba86d2fa733a1c16a557b30a2ccb36601afb9fdfb865e01b28fa77