Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a057005927c29db…

MALICIOUS

PDF

87.7 KB Created: 2021-07-13 05:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: da3169d61731ea0671e3c487f2191c67 SHA-1: 7f50a51f20a9b1a2b1a9e053c617761e0986fc74 SHA-256: 8a057005927c29dbddedeb4501e3b916d7d29387547988c9b6a843fd8137a2ef
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 as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised CMS upload directories. The presence of these links suggests an attempt to lure users to potentially malicious websites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://rafaelstore.ru/upload/files/zopigimerusafewepawaxukow.pdf In PDF document text
    • http://rakkhunnursinghome.com/user_img/files/liwiwupopajoganenipeso.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/g7n5p8k6125m8mosoivp9nvulc/pewawivuzuvo.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/wajedo.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/12709c367809c5216a732572348d97d9/tugalibubutefuzok.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/23866639223.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/m21qc4h1lanc053lubvef6opf5/kakanonewisuzotiredimoj.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/n766nf45q90310a900hhk1rk6c/10525260826.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/xigorip.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078200a7112c---vubipim.pdfIn PDF document text
    • https://soechi.com/userfiles/file/77079934472.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b276fbe9fb5---72176757777.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c453732e9---79048892020.pdfIn PDF document text
    • https://noddy.nu/images/file/78168678680.pdfIn PDF document text
    • https://activepymes.com/pub/file/jevavunutuf.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cde0bcf01---tuzexelupub.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b042949ebe3ea1a6eb3d5b389da7bd1f/paxuxipulikap.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607887150718d---ribefojasuzanofukeges.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/fupidusubakit.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607638c2d1412---18237683917.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/16398744399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+punch+onlinePDF 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_off0000f82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 10008 bytes
SHA-256: f915bababf919ee9030b3ac66434b7bec3b0cc88c402980c9b06ed0815f17e4a
font_02_sfnt_off00012650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 16920 bytes
SHA-256: 33d0e4b7563a5b2b86bcdc48cf11f8b08d36807277808c875faea3a360824e31

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