Malicious PDF — malware analysis report

Static analysis result for SHA-256 411a5c10599dd763…

MALICIOUS

PDF

92.3 KB Created: 2021-07-02 00:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9877b18a1c1e7f685a0459bd541a52d3 SHA-1: 08f687e3da0050c33f70e73f5c6a820788845576 SHA-256: 411a5c10599dd763545d33f6a8cd00a95227fd0db9b5c5f161989bf98013e4ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the attack pattern of luring users to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=modified+version+of+clash+of+clans PDF link annotation
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160706e0a4ae16---xanexagozexurebusototut.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908395ebbbb---26155880743.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/japunifofojalavotupaxeb.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/41557458137.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/bd3ebad523736b1f456e2caf3016fb68/sufif.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765009d3e66---tuwizekikelipogamezul.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/mifidezuserape.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f7b31b9d226b907d45d38236e843e96c/jisixuw.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f81cedd1e3ba9482fa534018c381781a/58164788014.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/77500766138.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b819029ba6a---639274210.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856dd26e279---kewujason.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/44758587362.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/rewoka.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ccb17e794---47679703733.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61788279822.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/navofapamiwam.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f226eb27c---fonigedodorefuv.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085a5aa54778---52871911803.pdfIn PDF document text
    • http://apvn.info/userfiles/file/50810555481.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/60240535648.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b036cef45---69607507006.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e2e052c59---nowebulefukazuk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off000106e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 16672 bytes
SHA-256: aae95d8739a65f773cc39b8532eb7a98f99a5cdb3dbb9cbdefe957cfabf165af
font_02_sfnt_off00013205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1C 10536 bytes
SHA-256: 3131ae8942f7a6c6202e010cbce81ead1ff2f4528f7824959828c0a966cc7a13