Malicious PDF — malware analysis report

Static analysis result for SHA-256 42505495ae0c00b7…

MALICIOUS

PDF

84.8 KB Created: 2021-09-03 01:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 8c98c489b8cb530ecd12add16a563ac6 SHA-1: fa8e3552b750caa0a42a0cc809f40fb1a858887e SHA-256: 42505495ae0c00b71b81d23a7c9681c54a148d9386fdda0c2ee0218eab58657f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites acting as a link farm. These links likely serve to obscure the final malicious destination, which is a PDF file. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca221a5a0---sakukibujitav.pdf In PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/73778444208.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee0b2194cf---muzurukim.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/708765ad8b28a6c25379ce7595e6edc8/90486644799.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/gbqua40jfrp7nj0he4a5k85qso/34732740646.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/64168997029.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/48310647249.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/pumuxokugidatinuboxevuruk.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072d61ebffe1---10921095630.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608eeb8367f37---55431041413.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/73875299053.pdfIn PDF document text
    • http://teraval.cz/res/file/wupiz.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/13403840803.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a69003d2ba41034ca9576edf37db928a/76868519439.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/42684127983.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c50d8e1a27116df314bd9a696ad77082/xewev.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd9eb9ba7---bulud.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/47562123349.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/mulanokujanirokir.pdfIn PDF document text
    • http://schokobrunnen.com/idata/rotovox.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/251439855fa9dd09f5ace311fbd75bdb/20366256485.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/53585784501.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/77842470046.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/33945843403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=stories+in+urdu+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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 21724 bytes
SHA-256: 533487909b675255173e67432ca8eac10b4b6354ea0d520378de5c4992c96a3c
font_01_sfnt_off00011405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1C 10752 bytes
SHA-256: cc2cae8e39f0867bd207c70352c5817efdef1c69e3f3694db2e2062d1323432c