Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18ca2f4af9cbb75…

MALICIOUS

PDF

85.0 KB Created: 2021-07-02 12:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dd4f8fcdd742ca0decf5b69bf3449ed1 SHA-1: 46e6ab32418ad87039e937db9b62f1b25dedd53e SHA-256: d18ca2f4af9cbb75cff0ca3dd5017edff15e0c10eaf901471499597a1f667071
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 file contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution scheme.

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 https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160788c06359fb---38133755116.pdf In PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/xobomafi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080492ff21e2---36709449930.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ed6ba1474---67291721787.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/49514791392.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa948345f---jatepali.pdfIn PDF document text
    • http://efrex.cz/files/file/koziwemokubu.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210626200130_dgl5wr.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4f1543185---kijebogejoloxifituranu.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/nugewodaj.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/82206776302.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd2550b998---mexelebisejevu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6kbbtni3eecgr1t96frcr677l/89946179379.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/topowunoware.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af1985d847b---jobapesaxadidogew.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/20651709370.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/rufumipusovixejirivuf.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/28ndq23ghngrc697pp3hl12h8v/xazigedaparafivivujam.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/wujoros.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/7455137931.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/6801afa620243bad45b181f8de632df1/40471572293.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16087f3559c05a---9393918371.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/lukutaxadowapanepen.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/97390528316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=secretly+yours+by+vikrant+khanna+pdf+free+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_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 16888 bytes
SHA-256: 96eaffa8ae9e1e2333db90be2dd3131085161ac4a0962a1b142353894d0de200
font_01_sfnt_off00011394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11394 11388 bytes
SHA-256: eeb23f5dbe6be1092eed9ad3edffd4e350976c008c3e6679e803501cd3a008de
font_02_sfnt_off00012e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1