Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4964c01cd4ea22…

MALICIOUS

PDF

61.3 KB Created: 2021-05-06 05:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c229032c2d9dd56f04230cfc7edb4d4 SHA-1: 4c75f59c8d7ef6e94ce8c1ad28c314302aa36385 SHA-256: 0e4964c01cd4ea2280b8eb9206ca973c8fcb31f59c70ac6ceec1a079e08f9adc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards the exploitation of PDF vulnerabilities or social engineering to lead users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://comp-art.ru/userfiles/file/4639609146.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5ac26490e342d04ebc1def8e01f19573/89597356242.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bf84bda53486ab41356fd30b422a71ac/kilomo.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/73683697208.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/99150899801.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/r3omee0n4mpoj5kvb4padrh2ef/zabafeg.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079d10eb6c0a---49207106039.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/adf85ef5b4cf44c08c7e455ec8863a8d/22093845649.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c69fdd81a732b695e4f4346f3a5dcee5/84907527826.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083174d8f3e8---gujugikutuzozubis.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/evq61jd02soq0ln54dukp6qsf4/91014110928.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f00badf34f---98059660105.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2a9cb6b9e4847b25f0178a242ab7efb9/lisapodezedur.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/cccc019e3ec183340b13426caa69e28f/merixomaxavakepegobi.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077facb03610---73576909019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=create+excel+spreadsheet+google+docs
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e073.bin
7f53c51ccb04fb0697db3969be64a421ae0166cd1f524efa042b4cd44f2077a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE073 5308 bytes

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