Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a18eba95706649…

MALICIOUS

PDF

83.7 KB Created: 2021-07-20 05:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa50a5c41f3b449f1dd7940dda020bb7 SHA-1: 2e9e65ff28cc6f813044738f9a7e4733eb80bd2d SHA-256: 01a18eba9570664937102d63515019c2262171f7cbcb3dc95a6644cca7c69e4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/besat.pdf In PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/77410411651.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/89908703239.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e199374ce---kopitevazerisaworavanaze.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/tovidegiratezoxi.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054c6309fd---74208608988.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/17242076039.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8b67240ed---maxarabulikovupokugar.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1c21eb26f12a38a10096c28a968dca77/60978002260.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/43212842030.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/ratuzulejobidoj.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rowidapo.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/95588676014.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/satenivasexupujofosigu.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/zinudokanopedokisisilojam.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e56f55bfca---24293194969.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/kezizekuvu.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/rerutof.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a460022fb---20371214574.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7upnjcc0m6eaqd2lbfsrl9jh5d/luviminamagegozoxopuf.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/45c82dec296884771d8132c4b477a083/59697040273.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/zisibagututedabaxilego.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f89e1a69---pamigimiwunidak.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/57338667949.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/jc5089928fiamemsdafcd129c2/jikokufitasevinanul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=horse+and+girl+saxPDF 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_off0000e698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 16728 bytes
SHA-256: 6965198a18ca2c9253e3a47c9133dcf2797baa78398c000d832a51c599b13613
font_01_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 10420 bytes
SHA-256: 08928d2366471099056d65579cd087c748f6347d623310a3316aeae135c9bbba
font_02_sfnt_off0001299d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1