Malicious PDF — malware analysis report

Static analysis result for SHA-256 99842fc9a405f498…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 06:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7210ffc78bed165dbef852143ae7a764 SHA-1: 0195541e4b4ef97eef4effdd3023a0eda03b35bf SHA-256: 99842fc9a405f4981d7a23b3cc4de3d315cfee3217b350e913f78c616f8770e2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure, potentially delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/mumipamokebixes.pdf In PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607565d745680---busugi.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/4ac2b159c0b7a1f19d2855b4884e9885/wanika.pdfIn PDF document text
    • http://esejsc.com/upload/files/53273695805.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/feb24251f1bf0dd153ce5162f78dc3e9/50315735168.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/nukunozomo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a99a85ee6e4---2399451172.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a9e2e650---48517779447.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/wamobabiribudigikinopu.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/49785700588.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/97207520343.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8ef506e80---xugokiwijirolik.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/bfe19a1ad2b1aee7c66940f7187867db/gofikijodogepiwiwijoxavax.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/bc73p0tj1nva7h8ca3s3n8lpc7/jaxogajubedurijam.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/63682092310.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839834b2513---59335555483.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/87373138369.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a002daea6c9---pagijoxisojunaziri.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc96b20d619---bogojoxas.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160812c18e98b1---43684665938.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8f5890883682a26f9f14460b57a7f464/siligik.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/ravudufupatalogawasutobuk.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/16sq3a1j2c9iv1psu4un32jp9m/durapotixa.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061723280039.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/83133936723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mp4+movies+downloadPDF 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_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 16912 bytes
SHA-256: 36ba7deb0e80c74c98907f54aaa0e37a7d4b0fb1f402f7da80715775469c31bf
font_01_sfnt_off000113fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FC 10580 bytes
SHA-256: b2b30adec5374f446b647f22f4bb111ee085b3cb21164c713ec1dcbeeb0fb619
font_02_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1