Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968b777637c310d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 01:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0e990f588d49fc3916745350ccd2eee4 SHA-1: df53aea3f671c99a5ed4631de6b74319eed49d67 SHA-256: 2968b777637c310d5a96bffdfc0339e15563b6a82c1e324ae2db4156841631f7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The PDF also references a large number of external URLs, many of which are likely part of a link farm or phishing infrastructure, suggesting a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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
  • 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 https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405824cf34c---pikanijile.pdf In PDF document text
    • http://mega-gold.com/userfiles/files/wimimageperuw.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/94668455720.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/47510459454.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/kabajupefirafuwizutob.pdfIn PDF document text
    • http://xn--5dbfbdrd7azav1bcx.com/sites/default/files/file/xafuletatukorekuzax.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mumelitufaxiwujik.pdfIn PDF document text
    • http://saint-party.com/media/file/zawadusoxuwitipufipoxun.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/mexexidalewe.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/22750352512.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/nuget.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/53177990114.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/fulijurovoji.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/kurebalox.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/giwuwapowi.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090711265917.pdfIn PDF document text
    • http://citra.cl/userfiles/file/rorexufusiwonipuda.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/90829537572.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109060001536365.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613837db11508---pefabubobopurixapizireb.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/21275968517.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/51036300616.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/xugejiwafuseg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sas+4+mod+apk+god+modePDF 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 19456 bytes
SHA-256: afba7e8e01d700cbfedea07bff9792524ff7d55d688a9401ca19402582a432d2
font_01_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BC 10540 bytes
SHA-256: 1cb18222b88d1cda39ba61ff288ee0308fc8d9d65d9f3d019a5eec95727dac6e

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