Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d99d207c1643b7…

MALICIOUS

PDF

97.9 KB Created: 2021-06-28 19:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a013a8cce3b574920c80f80f39a770f2 SHA-1: 2d0c127e766d793428fb055343697bd1827fa7ab SHA-256: 41d99d207c1643b732553246a5f5f7939b44ba1eec627d88aa061dbde8fdd581
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a malicious file. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL findings are sufficient to infer a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • 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://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babb137a909---47912939145.pdf In PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6a53d4dfb21498372c7c50b5dd4d143c/fakiwigevov.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/wubatuvasonupadudujew.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089767cf3bee---gusipegidura.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/87578070207.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/sefomafasike.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a06aa3efe76---73164861944.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/vobukexogu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b95dbeba0d---lexowagikixenilo.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/vikatawalegubavupi.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/3650c2aff3d120e7cdd4fb0e30483d7a/26325181691.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/poxefafugewigarup.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/8965417916.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/2b543ea129f61a9af230f471ffa21296/rexopedosogaku.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609241e6cc0d3---dumetapojetojigozo.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/xomawejov.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c25f9f101---kawijazezubufatazaxep.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/31504162520.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210531091451799.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/df2a5bd71c043f5cfd0c50c2a4c50f23/31825661222.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c1170799c44fe2030e45138035a3ddd1/86767344538.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8hfiqham059mbkelaoftlfpg3o/ziguxakabivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+dungeons+play+freePDF 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_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 24752 bytes
SHA-256: dd8236c405b212ce1ccd3d63cb46525f1bc91714d7c7d8ed3e9589c39c7f77f8
font_02_sfnt_off00015f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F97 11000 bytes
SHA-256: a591c30fc7bef3bddd54b959fb1da628fca36ee8e86f402a7de104684de64e42

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