Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9302276fbdf3cd8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 09:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1bf5f7d42fac8d12b6c276ea5e457cbc SHA-1: ce10d9753866ad5b9c2bdd05f014a1115bbe99c2 SHA-256: d9302276fbdf3cd8c891d7c818715f1dd638b86b746e34dc44e069288185f7cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains an embedded JavaScript stream and a significant number of external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. These elements suggest the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=bebop+2+skycontroller+2+manual PDF link annotation
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876dbd82df2---xedopogizaledunej.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kagimila.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/pivagijelumava.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/54e3c1e032e2d47302faaf17dc9dc78f/fibobuvesazenuzogefoda.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2a3cdf29---93818155552.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc5eb2e246---70473398338.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/7974828802.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6be5b221---wuwegeledesowavo.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/kalepeton.pdfIn PDF document text
    • http://innotack.com/userfiles/files/23373928105.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/gikudivolapap.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/22609481804.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/jusuxowujesekewavapubirin.pdfIn PDF document text
    • http://bakoca.hu/files/file/xegafufizipiziv.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1b2ce6c86---mijoto.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210608142145100.pdfIn PDF document text
    • https://promise-land.com/upload/file/geguposan.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/vopogumo.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/getetufubaxupojagufibep.pdfIn PDF document text
    • http://davisnewfoundlandfamilyreunion.com/clients/60627/File/32500144890.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/78041647636.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/26f67ccf060f2bd52a5352a3d4fc0bc7/vakazason.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/34441985634.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/kulejopowekejoku.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/zatubojogikigebeba.pdfIn PDF document text
    • 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_off0000dd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1A 20752 bytes
SHA-256: 80e5ffc751ff09d9312b897ae1e42dcc7c938486f408df29a6aaf248182da66d
font_01_sfnt_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 11060 bytes
SHA-256: 7e38a261995c2e6db452a46788bae1f876820bc91cb26c89e94d0d9edc4376cd

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