Malicious PDF — malware analysis report

Static analysis result for SHA-256 806e020185ad447d…

MALICIOUS

PDF

87.2 KB Created: 2021-09-19 20:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaba9f0f4cca7a954320e55214e82bb3 SHA-1: f4f307f416da8722bced9a34d39a31b40bb45a37 SHA-256: 806e020185ad447d698f361da283afd50431fe180d2efd1b861603c730bf87da
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of distinct hosts and links, suggesting an attempt to obscure the true destination and evade detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://rentator.com/uploades/fckeditorfile/80027746652.pdf
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/sanubamewuzezot.pdf
    • https://naves.cz/res/file/zurela.pdf
    • http://arohitourandtravels.com/userfiles/file/8313567821.pdf
    • https://curvy.tw/upload/files/31505215427.pdf
    • https://iva-vietnam.com/userfiles/file/55524208135.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/zoloravok.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4ecd2b134c61ed83ec02f093074070f6/vipofidisevejiwofotudu.pdf
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/dikekoxizene.pdf
    • http://meuble-tunisie.com/userfiles/file/82481338871.pdf
    • http://toyotaprius-custom.com/js/upload/files/74037180151.pdf
    • http://teraval.cz/res/file/29951498794.pdf
    • http://pnalog.ru/images/file/venukosopowulojufes.pdf
    • http://eikenhorstgroep.nl/userfiles/file/xatev.pdf
    • http://heatexchangersolution.com/upload_fck/file/2021-9-20/20210920010920845575.pdf
    • http://metapolar.hu/tmp/3277002362.pdf
    • https://mi-stores.com/basketballtotaal/images/editor/file/69992988798.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408cceb2bf7---lefitoneboniludufadutiw.pdf
    • https://grdr.org/paidel/ckfinder/userfiles/files/sopitipodepagaj.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16145c9d08359e---tusezodes.pdf
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/37023176391.pdf
    • https://lotusmarinevn.com/upload/files/68138289153.pdf
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21767394998.pdf
    • http://duonglaohanoi.com/userfiles/file/2990387515.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=non+verbal+series+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee47.bin
93f2466387f4bfb8094060973041fc76de0eab9eb776def0073abe3ebbf93d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 18572 bytes
font_01_sfnt_off00011ee0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE0 16792 bytes
font_02_sfnt_off000136f7.bin
5e4d362364bfef683c75bf6d964ade2f6c95bfada6f2f946fa7e6b9ef7d5b322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136F7 10576 bytes

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