Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d03010984f333b7…

MALICIOUS

PDF

80.5 KB Created: 2021-08-12 07:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e69e1d7e29331c53d2f59b14f541507f SHA-1: e1574421d787e17498769dc2590c0fdbaa6a8950 SHA-256: 9d03010984f333b709cd883b48dde26aa5649a8ac803d849bee685fda29eca9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://store-connector.com/_upload_bilder/_filemanager/file/fawizemu.pdf In PDF document text
    • http://ptairsupply.com/userfiles/file/likodilopufa.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/87104106799.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a355306f5ea.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/154308550d2b0fbf5588341f4c3027d9/kovegego.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/gasexope.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/25810691716.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/wazagefinutavopoditogemod.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609341ad78987---35567344220.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/efdf406e2b4ac20e5d35a11dcc5af272/terixoz.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/89185954175.pdfIn PDF document text
    • http://generaldistco.com/images/file/86849175146.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083093f9f554---39370323527.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/56821299981.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6ad869de---ruxapejivej.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078a87163596---64244714121.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160de9f326206c---givivarizokeforudokaz.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3cqk9mlts1chc58r8hlj3887o0/62893751002.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/xovuvawuxetegixuzojuvod.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/zabuvan.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073cb4917338---riridikedesedo.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/25784896159.pdfIn PDF document text
    • http://terminsk.by/pics/files/72194680941.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/dugodus.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/84152942933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+automatic+millionaire+book+in+hindiPDF 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_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 17232 bytes
SHA-256: 7abe5c0c40124771723b458765e84c08ad6c1037a2e4a9a507f99ebc5d9a100e
font_01_sfnt_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 10764 bytes
SHA-256: 944b0f8c1f9b1fc20ea7ba26eb0b95245d5be709110a6142cfe64b2766d927c8
font_02_sfnt_off00011aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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