Malicious PDF — malware analysis report

Static analysis result for SHA-256 963836c2e77dccf0…

MALICIOUS

PDF

80.1 KB Created: 2021-06-28 01:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dec364ddf3dc083a8c2a9785ec4245fa SHA-1: afa8ccc89d9c5b632fd4c019fd026be947305f54 SHA-256: 963836c2e77dccf0d04f66b8119ca9ae5345d2b847933dfccf91ec1d1b5ff753
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://nomylo.ru/uplcv?utm_term=his+and+her+nails PDF link annotation
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/a994af237cace0af537136a8ecbf960f/fodilokasapojibabusopiv.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/jikojogodolaliw.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d237b261403---gobewafoxojajuvozunosiza.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074cfe55414a---fafuwowunigaxudukibax.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/1360660080.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/fatimazima.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/34846537365.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/02c068e9970e6da7546ddc5323b34008/luvubatavexafotufi.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/92391650469.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/79np818eggojv2vovpnb7d6v8p/jidigotetubamibibawepun.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6a48df74c---kamogaro.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/16075463663.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/gefakigo.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9040f464c0---81766248813.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/m4j4tna3akm8jr443h6bh2stto/zabofixadatetuvojeberig.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/beruxometut.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07261ae80e---52620135264.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a92d16ab---wesurifafefanofofilobig.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/24993509753.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/9884763582.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5479e2f285---tibikufukuzopalako.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/375e97ceeaee70e0484cd7788c96790b/57464380052.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/63366249629.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/82456455694.pdfIn PDF document text
    • 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_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 18120 bytes
SHA-256: c7c401a56227d450ba5034cb1983ed4f76452d6f47d71778f0e42970b3ca1528
font_01_sfnt_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 10120 bytes
SHA-256: 5871e8b5a236af2addf21eec37baf2783451f3f5c8fb3488fb10fe8e1a2fb369