Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8592f977f95cfd…

MALICIOUS

PDF

102.5 KB Created: 2021-06-30 08:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c753728b9ebb89228916c99ff2632882 SHA-1: 985791bf07f77b613e9b93f7847b919e79a1a3a3 SHA-256: 5e8592f977f95cfd3ba3da020247fea60641ebcf21aa27a2dea6e9f8112391ef
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains. These links are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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.
  • 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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a162c4930ac---dudiwiza.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/wazazugukotodaxilak.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160736697b499c---30824526045.pdf
    • https://pfhotel.gr/ckfinder/userfiles/files/nitutuxoregan.pdf
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/61252579206.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac61da965---30656039644.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e30f219b01aa8624ac9e7af34bea08b9/bexolororowigujitatuvu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075cde60d2b0---3598025305.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2888913a4---nibasewumosegajoriki.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/cc1f0cnodojolls6m54b1mhmpn/71301707491.pdf
    • http://ukwoodrecycling.com/userfiles/files/gimizakaritimosapoju.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7754eda4a---tasanevuwanudasadupixoz.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/bobipi.pdf
    • http://chromowane.com/userfiles/file/dokelitujenogujimadi.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pi4n8k2levvef0luqddfivqo9h/35893905215.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d7765549---8040330638.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/a891e009da1a4a194a6e018f9be0a59a/xufodipekegoganuto.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609434f329cf6---laxisidilopetubezalulowok.pdf
    • https://bestcoloringpages.com/userfiles/file/57086661066.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a5ed1abbd---pelanefadomunomupoxuleva.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/23477743965.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/dd4babe90057a68764d52d5e4727dea5/zibomibizuvugikovivigor.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0a018341---12762267224.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=been+down+so+long+it+looks+like+up+to+me+pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/c91ed32518f59bff4599e2346edcb2d5/mupejemejanuk.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_off00012978.bin
84ab2e3ab232df090465e5d5249db2c8d7399263e76cfe9c90ee090e63a34ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 10912 bytes
font_01_sfnt_off00014298.bin
eb4ccf9ca87a5ed3c47d9071913aca10f9a1de5c54b4a275101e07a5c790abfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14298 18716 bytes
font_02_sfnt_off000172e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172E4 16792 bytes

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