Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c07264ebc94b423…

MALICIOUS

PDF

78.1 KB Created: 2021-09-08 02:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c8719041f4dc3908d23576e89da0a4a7 SHA-1: 816c45e4c86a3d16a5aa45df66b89ce978abdddd SHA-256: 0c07264ebc94b4232b084597f8a8f1fb42643b2a1003a12321ec73e5cd9be58f
132 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4830

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae459423db1---78754386052.pdf In PDF document text
    • http://cesurmakina.com/userfiles/file/84473600739.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/gosovemeno.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/5611301812.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/57212802212.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daaaf35b585---90878231779.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/vesopegitumanaxoj.pdfIn PDF document text
    • http://polletnv.be/uploads/files/99447472055.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/jijumek.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/galezetiredukaver.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/93102667364.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608f09374c605---tulileresewiwerofaluximi.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/39977547350.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/97942866434.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/806e36c909ca65cf86a0afe36e4776ee/21922939533.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/31660934098.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/xizofegakexepakebegakaf.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ueeeiadba5vj6tt87fdr46e5mh/vizeriwowofesazogekekasus.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/98865409012.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/gotugiwuwopig.pdfIn PDF document text
    • https://ovalpolycoats.com/media/76188281504.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/82589242198.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607222eedcd01---70583326664.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86afe62347---12726539641.pdfIn PDF document text
    • https://migger.dk/userimages/file/tojawuminovukibo.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/nawijurirakevejaguzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=homelabs+portable+ice+maker+machine+for+countertop+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 18460 bytes
SHA-256: 2840f3c81b3d615c35df243480a772994504f1664895aee43275159d35ff19cf

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