Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86e912ff1cdd983…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 13:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 01462230f677bc5964f67e1c6b2f1bfd SHA-1: 28bf27d47fbc7550a1fb38fa16f1259a3362d14c SHA-256: d86e912ff1cdd98379b9d42fe098a811ed73080b71abac1a2af6fbc91fa4c343
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a distribution mechanism for malicious files. The presence of a download button lure further supports the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab138d14fea---56626988267.pdf In PDF document text
    • http://camonetinternational.com/files/file/81087390818.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/demixuniwegevuputibamu.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/80673425928.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8c91d5764---19306426831.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72950ea97f---nawekejitide.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/2j05bl3vbh08tge6cpv2tbo55c/besolu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/8jm4oqmn3i2mu0lc3i915la80q/47552508835.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/9bbcbf4fc89b28862a0e875cad3e4815/xodasokunetexidukowiji.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vodirazagofed.pdfIn PDF document text
    • https://ebooksweb.net/files/file/57960140932.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/17541276600.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99fb5d55eb---vofududazirukuj.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/62ii3hhq8a1sbacc71tbrhpc16/luvawazodosalatuvejetu.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/nokekogitevinij.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/84206434232.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/fbb5bd2a5735039ea652e862f04e14f2/67257235042.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e34fde85c---34115308465.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f16djel47la2rjg8c8o3q8u558/samadotod.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160db5359ef0ab---93374659670.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee951c57bd---rufozor.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160789c7498987---dajasapinuzusoraduzozamiw.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9ee8d150---39990979683.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/49224537953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+wrap+a+knife+handlePDF 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_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 16804 bytes
SHA-256: 6a514f28ca6e7683b6f2b46654cfd0d1a642ced43fd7fe6103c6d687b41edc03
font_01_sfnt_off00011dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13615 10596 bytes
SHA-256: 19869952149daa4dfc4dcc55bc57e5aa301495e9d1491c4a964babdbda980c6f