Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1e13a9952664e2…

MALICIOUS

PDF

110.1 KB Created: 2021-06-27 15:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 20fd1d37bbafae152ffe61aa3afbd801 SHA-1: ec76267e63b2914c2a4d850d14482aa51b664601 SHA-256: 5c1e13a9952664e2a761156de5d06f602ffadaeca0c8e5b4c5836a1f8c76d3da
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. These links likely serve as a lure to download further malicious content, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/a0176b98263dd44f7613ffcea0673ffe/boradetof.pdf In PDF document text
    • http://sevimticaret.net/userfiles/file/luxekuxedumobojazara.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997649975f---mofomufurutovewezi.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b174b763b20---pakowuzutog.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb843645b7---wixuleponovulefoperu.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/xodezezekipetadonusiro.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2a400ab42e7f92cca8b09ba072e2a95b/1223398830.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/45241611338.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/2n2q872l4153925p869e576kl4/38594917262.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22f6e3fdb.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160760c1e7e93d---gaxulo.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/39968353865.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/46e415690e55167747e1b7796d015b2c/83039584603.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/1b4p487b1fdkl03korgtk14bqq/jizavofalakusan.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a7e0ee7e805---xibarojafekimofamelu.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/85119489628.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076745972f43---67643913805.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b926d52f42e---49467750209.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80798fef7---27875523001.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44f58b224---roraluzajipexujepebaje.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210625231027.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/nikurimifi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o5f3pn6gm8tqimfgasliiqrajc/4806421753.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/43513435493.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1c594a2143cb03c41fa2b1a9d86db2da/kazakavovar.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/765890360d3efb064ba9a8f4e5b2ff1e/duwimakixavox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=artificial+intelligence+a+modern+approach+2nd+edition+solution+manual+pdfPDF 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_off00014c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1F 11268 bytes
SHA-256: 26dc4cc6af7aa3c739c9232adfba825788571727ad6cb35ecbdbdea4b26f4071
font_01_sfnt_off00016637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16637 17132 bytes
SHA-256: 4fd1ae25f290f5909ba4e8f8a8e67d25daba92828d75e7b9a03729f55a6d86ea
font_02_sfnt_off000192d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.