Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee3243f151a9842…

MALICIOUS

PDF

88.2 KB Created: 2021-07-28 10:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: deb1baaa92dd42b1b60280a97b71b21c SHA-1: e06288a8417de6e8d29210629466463763030609 SHA-256: 3ee3243f151a9842684fc8202d06a77688ce2c1b2d0942ddea19d5bfc93a4794
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous disposable domains and compromised CMS upload storage, indicating a phishing or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the presence of multiple suspicious URLs is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://superplasticizer.cn/d/files/bogefeloweta.pdf In PDF document text
    • https://melz-feu.ru/upload/nisijudifiwukudapepigulu.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/nifiporunewitutas.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/tia00ojlf6guj3d21t7rhubu0u/60566843491.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/45p56qs8b5tkcuc8p75of5ce90/gavuwu.pdfIn PDF document text
    • https://tisuputih.com/contents//files/67963652634.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/64731691979.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0bce648d0---saroj.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95783989251.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5f90511f8---57436474269.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/u4tsefd1idlkr5e4fkvhalh7g8/delefejuxalagovow.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/43375145377.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/71732666626.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf471051d7---lugisafezagisitok.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/bisawera.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/33858220783.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/lubexaralosow.pdfIn PDF document text
    • http://mldinsaat.com/image/files/53251288881.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9194f1d3628eeed62988e0955e2105c5/6952545666.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/papexikapuk.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cglilrv6c0gfhae234qvvopjr1/30773978461.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tatarugejolunifu.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/rujalajesa.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b3839a689---56884857564.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ujpepr3hhbegmo40320390m7uh/99454745863.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080e992a2126---wawovaturoxudiguwes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=can+heavy+cream+substitute+for+half+and+halfPDF 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_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 17496 bytes
SHA-256: bcea0589c8add094f50a3ff09a746146e200bd26ef134c2f446e0bf56396c7e8
font_02_sfnt_off00013669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13669 11192 bytes
SHA-256: 3f537d2438e6187f12e7c336ff253d090434df3441e441aa447eaedabe5a3c01