Malicious PDF — malware analysis report

Static analysis result for SHA-256 50cff888356f1233…

MALICIOUS

PDF

83.6 KB Created: 2021-06-30 08:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0241f5cc99b993617b8dc9f7eb774d9d SHA-1: 50084e09749bb3e80052547afcb453b092b66a01 SHA-256: 50cff888356f12331279c58561027049de02d7957b3089d7800ea46b9eefe0dc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hurtglass.pl/upload/file/liruvivevazirunelabetexi.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b00956c8cfd2e5815ca83efa0ca29824/70627162234.pdfIn PDF document text
    • https://tantecoccole016.it/file/nodiwokazewipekakewad.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/cef85209f4b022cce8ca70e053ea6a83/88079686881.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c44cdb7f0d959860793ac4c6dbc0c864/kazifawiveduj.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/635ebc1bd05a4a3879c12c83c102c8d6/59721167571.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607b181ae25a9---sutigoraxigob.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/89289920031.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/34655989315.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4f928dee86ff25c46c7333d861fe193a/zipaxipigidemifasit.pdfIn PDF document text
    • http://yongqingtech.com/d/files/xakekasurozub.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/lumijazokipo.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/98657934875.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c98e31106---wamosovajinokoj.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/konojuvur.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/0069e6819bc99d14e49a0ae0f7a95e4d/dagixisafezagewo.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/v4gud73c16r705tsd33t5i2s9j/11665303825.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/57447b8819636ab4fcff0e962153effe/28091739545.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160865b1ac5ce8---78601478855.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/32204695333.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd668dc323---sozabibe.pdfIn PDF document text
    • https://andana.us/files/files/xusimomidekoriv.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/03t81glji1a6qumvlafi7arcp2/57280787276.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c37826fce---tufovedogukumapawakoma.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16d993bf2---31595640358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=nine+letter+animal+starting+with+bPDF 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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 16952 bytes
SHA-256: 4096a40b0e4b1aa8299b329d72326bc0402447fd96d1aa6d2dda1f19c0c807cc
font_01_sfnt_off000110bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 10640 bytes
SHA-256: 63f900deb65717d93c834756852eb6799df41d43177fbb569fd0dfd760aaaa03
font_02_sfnt_off000128f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1