Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f59013023dbf93…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 17:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8cdf0541b29b60dd6e311deca4e1d987 SHA-1: 9a59331574753f97b5b535b00d6e1f3b6accdca6 SHA-256: b2f59013023dbf93e1e576b3b334e874ba4cfe8f31639e12b0341d577c5de946
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to further malicious content. No scripts were extracted, but the structure and URL targets suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609df6007b751---rewafupowinomawilela.pdf In PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/varejufozamazexuledizula.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/36783738860.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/ragagenovivivi.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/2857362909.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/xokakusare.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7e413104---96091625455.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/27840743173.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/17626129350.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/98485975101.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/dovuwibini.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/sovuxaluxenulowobazut.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/wekuwigixojugifazag.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/2gckk2qk7c1n6g9errnk3ks7v0/97040316215.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160860ec8df17a---51264494010.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/totutitodaxulit.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/wilovuxizekalaku.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/27520325104.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/91834078883.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/82c5e4d72c8e153e138e0d811224905c/18474637476.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/kuwaxoxigut.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/75830a83876a48c4a2f3a304a76add08/42661468210.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d8475d5ae16c00a63df3474177d36a82/loxivemakimaxekatetu.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/nuzof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sap+fico+testing+interview+questions+and+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30C 17088 bytes
SHA-256: 36abcb0507853e922593d47940cf3431e1b6df04592878d2848eca612668778e
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AE 11224 bytes
SHA-256: e9c859e19dc32f807c6aa240efc529a66a422d8f596a11658948a43acd1be0ce

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