Malicious PDF — malware analysis report

Static analysis result for SHA-256 941f3dda8d50bbaf…

MALICIOUS

PDF

84.1 KB Created: 2021-08-20 00:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: a486229980e08d271e1cbba0d4af14e0 SHA-1: 4c9c4d8b9edd2fb7ad4465107a8ac9c4c0c22f0e SHA-256: 941f3dda8d50bbaf0fcedc4724a3d8533b11c2972285d2ff24bf013ac372d838
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to potentially compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a link farm designed to host malicious files. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • 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.
  • 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.
  • 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 http://gptools.net/userfiles/file/dowanafovorik.pdf In PDF document text
    • http://guides2alpes.fr/uploads/file/36076940671.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3b8519f4d60b5d81f111de9b7fe8ccc6/tarun.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/30386847426.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/wumamewerutu.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/34913337115.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/wofiwatinewonozapesuruso.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/liralo.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/wigomabewubofo.pdfIn PDF document text
    • http://darec.sk/files/files/15922838478.pdfIn PDF document text
    • http://daydala.com/userfiles/file/kikek.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/15367131911.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/qj9gr1ktuhj6usklk1ae5jhq21/94309386791.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c534de95571---vakasawakegog.pdfIn PDF document text
    • http://topas.lt/userfiles/file/23676316245.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc99939eb9---vizitafoligagulajij.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/62648901455.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/gukotedorosul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b82cd8e25---kubevigixudapewu.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96076208331.pdfIn PDF document text
    • http://www.eventoptik.de/upload/files/kejapawuganogiwizuwexizaj.pdfIn PDF document text
    • http://ukuleleceilidh.ca/clients/860383/File/jipirebugex.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609040df6089b---vidapisujinigup.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5120a1148---53610985225.pdfIn PDF document text
    • http://www.hcc-cpas.com/siteuploads/editorimg/file/39574146982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ecg+made+incredibly+easy+free+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_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 10984 bytes
SHA-256: 534e8ec2691fcd8f26598b3cae7457c249ba8a2181193377ba23fa33dccb7974
font_01_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 17724 bytes
SHA-256: 2f18cfcbe6e3eca48388ce0759b0eee15fa7866f75b67f56c2de84d88f0cd862

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