Malicious PDF — malware analysis report

Static analysis result for SHA-256 e692f9057e4f6653…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 04:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d8f860fef3a0d02d5d2ab4fecbc9a5cc SHA-1: 5cbf59c3c5b2f5d72c067c6f4a55778f51fe9abf SHA-256: e692f9057e4f6653e189b5ff4c61159b5c47f6119f48ca205892df1036f70ef8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic further indicates that some links point to compromised CMS upload storage, increasing the likelihood of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://blessingsngo.in/userfiles/files/giferisavitapax.pdf In PDF document text
    • http://ecovn.vn/uploads/news_file/6251587543.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/00a388436c76f84b415a721f0f6b9e0f/96749526358.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-13/20210613132316234008.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/sowebolarogugowivol.pdfIn PDF document text
    • http://nessium.net/userfiles/file/sopezilexavik.pdfIn PDF document text
    • https://777mto.com/contents//files/fovasatosefuwokutirul.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9fc438ea2efd330db8b4f108d46d505e/puranatefako.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/fbac6d6e00ebaaac46564d37f906776a/buwuxezojifir.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/wuzuxewonixos.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088dddab8ed5---siximagojekufalekelam.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1db85d0ca---wojaleporiforebomijasusob.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160735f7c12684---38149151703.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0ecb11d62---xizumixigas.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c289a0faa---43356739179.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/bifum.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093316f6e72b---80690151979.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160881bb7b33b9---26793322539.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/bavij.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/85166928363.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814b900ea57---zitolubosove.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021042914163991.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bcdd2a096b57dc78167a27cde582a1bd/korosefaposenazuza.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160733053e08a1---deparuruxeziniz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=multiple+select+from+sqlPDF 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_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 10616 bytes
SHA-256: a29fb18d9952eeb7ef293255a7c4e5c7ab46fcff28f0646e63c0db0f597c51ae
font_02_sfnt_off00011e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7B 20032 bytes
SHA-256: fd2e36049ee073c8780bba91bb6183556feda89e15dd36ce3cb8a967ef22030a

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