Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64945a3b7c30660…

MALICIOUS

PDF

78.0 KB Created: 2021-08-05 23:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3f69c6ede23d22bcbee172d6c928cd54 SHA-1: e01948b869e05eedc5816fcf1e45b27c2cf7c7a8 SHA-256: a64945a3b7c306607171873d5c1ae7766359417ca8d2820a2e7c7aa0a8f1ef43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of multiple links to PDF files on compromised CMS upload storage suggests an attempt to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5182

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://sportsht.com/userfiles/file/86290025445.pdf In PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/jikulaf.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/18407431040.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/xolejenukogirawinaxut.pdfIn PDF document text
    • http://charivne.info/images/file/56628470916.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/60946905957.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/fba774927dd55cd1b1a6f3954804eca4/xepepanakez.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/9065u9baia2aidtkl0ujqu7thd/sawasezugufamuliv.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f5d6e7802---kegadam.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078401901d2c---fejeweguxixojefaridibi.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/vq8hjskuqj0f50ugdu0inr7s9e/5460618056.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/pujojajo.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f388b13703e54a452aedacd1a5fe17b8/95787393980.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/wuruwesovulet.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a1d623bed4ed73d2ee3e6a28ef1b794/zinan.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/rosomavipedezosum.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d0db5a6a0---sipepujotalave.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/c6ed4f701b7574e5584ade7ec26a9aaa/71621331729.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///fobugeresizufumizukiso.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/waxoj.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/d9fb9587338c0568a494d664f664a5ae/dogixunijisiboxaxuw.pdfIn PDF document text
    • https://areicon.com/images/file/pipemumamija.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/zexizuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+get+free+google+play+redeem+codes+without+surveysPDF 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_off0000e553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 11320 bytes
SHA-256: 8262579f1e4b3f58294cd3bddf8b924c62fd991f8002d24202d9c2833b233edb