Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d22dc2accb49500…

MALICIOUS

PDF

99.1 KB Created: 2021-07-01 09:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9175f1e62cab6e40f78fb0da921b4385 SHA-1: 79e302dded5a299ba3e8b16f7dcfbd6f964c3f8e SHA-256: 8d22dc2accb49500237bd68c5469ed461d2e409573ad83ef7180d8313996b3a1
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious content. The presence of numerous unknown reputation URLs further supports this, as they likely host malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608786a02f8a0---39804742411.pdf In PDF document text
    • https://brickzoo.it/file/8335179508.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/94okglvm8317ru3e9h24p4c7be/niforagi.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/xizaresuf.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/61293583516.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/pipinef.pdfIn PDF document text
    • https://appfacile.it/file/kexatavemudeketadik.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/df8bc9dc39243739f0a98d11a0a4f782/16097192884.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc2c83a580---bibuxafidimorotakin.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b76143b94a---kamonotagezejej.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/69126578984.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/laxizofefepugefesalikerem.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/l0dronmibh0i0pcg46pt5jjd8j/79387078653.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab457a86559---68930152470.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/nufowatibadujuf.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f24cdc62b7---lareje.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/35719298005.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c085780c039---gidowobefosegovakisi.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ca4f70efabdd6e1767ffc54b0cba95d7/30711022501.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/5558471128.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/perona.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076d06c0a5d0---50436470170.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d91171573---fajezaxotuseruduwali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lto+network+stakingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 10372 bytes
SHA-256: f0ccc6c3ef9e5ae393f3850c1654d5ea4c3102b6a4b1d40b4d9cf1e53659b617
font_01_sfnt_off00011ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 19616 bytes
SHA-256: 9ea71625406651d953c19831ad71fa21642049bdd989c9adf0ad45e63b5ffb97
font_02_sfnt_off00015123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16934 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489

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