Malicious PDF — malware analysis report

Static analysis result for SHA-256 49607d3ecc291816…

MALICIOUS

PDF

86.5 KB Created: 2021-07-18 00:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ad42661e4deb2b18519197f91c0237f5 SHA-1: b3895ab87149cc93463501ef0b3e1d95dbaa07f7 SHA-256: 49607d3ecc2918162216e6957110cc97efd699e4590c81cc923d1f292a58c713
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to compromised WordPress sites, likely serving as a redirection mechanism. While no scripts were extracted, the presence of embedded URLs and the link farm structure suggest an attempt to lure users to malicious or phishing content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6c7ded804ecc1b7fa0772c839d545bdb/47213630225.pdf In PDF document text
    • http://www.deopendeur.org/imgUser/file/70213802875.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/fsbq2c8kobmgk8vp18j6lkd3v3/54789741327.pdfIn PDF document text
    • https://istanajp.com/contents//files/2375835663.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c931fe3413---rukuzoneb.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b605693e5e8abed64d428f446482bb41/zezuka.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e144b3a770c7ea794131559c24123c5e/55143344040.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/kakutesamoxukolapo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608023f51cf02---4821013795.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/zijutofikulajiwiwar.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/29877051886.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5dfb6e91ea---jigumagijexavavug.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6jco1gi98gf8sbjmq2fp0gfrj4/pizolapefipitosemo.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a864c2fb9---57102953732.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/090facb200611c58911b5248ca61d845/45233043861.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/pisegavolurisomiganisapu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbc7ad953b---34479010680.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/68f23694fcb7669a3614d4ccac6f57a5/18740053002.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088480b1cc1e---niwojirejizimakeseg.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/zilizebip.pdfIn PDF document text
    • https://baongochoa.com/upload/file/fejininejutopimelozi.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/bowifesaribedos.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c41e6b6f79---foronetifilosigixab.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/rowafagedekexifaxaxuguro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=diet+for+a+small+waistPDF 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_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 17736 bytes
SHA-256: 83a4b0642040420a133e93c826cfe79d148b1e8230280443338ff42101574225
font_01_sfnt_off00011d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13589 10360 bytes
SHA-256: d6d6abeae4505884c6e3876e0752da36ed5d9a9ab41732b665d52951f9829dbf

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