Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9903821252d18db…

MALICIOUS

PDF

82.0 KB Created: 2021-08-17 13:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 8f6593e580cd88017ca0c3d3600838c3 SHA-1: f5ff0745975527e8bbd03ace64b553dcac812944 SHA-256: f9903821252d18db76743adb2ba6bf8230a93e163da2efc8709a13114e8a4388
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://thegioidahoacuong.com/uploads/image/files/76812607570.pdf In PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfb443bdf---93843939354.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/butikipubitet.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://xn--b1adcbbai1bezln.xn--p1ai/content/File/titunerili.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/pugefomojusefufoxi.pdfIn PDF document text
    • https://ladangmimpi2.com/contents//files/sevonewugiso.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/motevugoxigitif.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/ruxotejixazajumanizon.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/67462125875.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/77367412892.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/48fd8e711dcb506e1c3b118c856b73f5/navegofanusuw.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/39119940221.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/mawevagoroxusuxu.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/joranosugexa.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/fonejojuduveliwuto.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/81896008727.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/ketutejutugole.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/74665058934.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b196eea7b86---padivosibuzoxukepedalub.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8745289e1---tewab.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf907082d9---veregedasazozobopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=why+the+rich+get+richer+book+pdfPDF 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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 16716 bytes
SHA-256: b11c5974a24e1ecd0c9534136c0128a52880aa625abcab06494e5d2e8b1caa62
font_01_sfnt_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E8 10756 bytes
SHA-256: cdee3f511402378f36cdf43f318a5478f008537726c7868f010398ad6617d5ab