Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31d0ea5691c8984…

MALICIOUS

PDF

50.4 KB Created: 2021-09-24 23:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8ed11394353d4690701b8ab20855a4d2 SHA-1: 504935d80290450779c5f88023ebb2ee9340790d SHA-256: d31d0ea5691c89846d8e3f0c5eed628c8b93f0de2d3965ede4b98c9ee6efa1f8
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and is designed as an image-based lure, typical of phishing attacks. The document redirects users to various external URLs, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to deliver a secondary payload or phish for credentials. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8752

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://crysiq.ru/uplcv?utm_term=below+to+her+mouth+online PDF link annotation
    • https://triatlonshop.cz/userfiles/file/5783901907.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/70770143064.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614450e6694f8---12351348216.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109210518178535.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/moridimidafunuzopogimib.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/37190096094.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/24949779042.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/roravojokaxa.pdfIn PDF document text
    • https://norservis.info/files/files/84359287964.pdfIn PDF document text
    • http://artediapharma.com/upload/files/kanusiditemosusitugidavog.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/56476082426.pdfIn PDF document text
    • http://webs123.com/userfiles/file/68472443080.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3f2936ad28b6e330639d91634fa9bd83/49847534599.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/20996961212.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/b41115182b835291214a9fe0d6a8c8f9/wakemuji.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/zikav.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614a389c70e14---64485066950.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/93207956953.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/govet.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc8cb8a59---nalebota.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/19229118756.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/rerunazozegunerex.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f801d1eb545a340e24dd6d005f8b2423/71076505075.pdfIn PDF document text
    • 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_off0000ad95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD95 10284 bytes
SHA-256: 8b1426d7c761774c479397861b26654e88b98dfbccf868e7438bc640cda09561

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