Malicious PDF — malware analysis report

Static analysis result for SHA-256 41382f523c1de280…

MALICIOUS

PDF

86.2 KB Created: 2021-09-24 05:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c747b1a8577989f39efc8044efd10aca SHA-1: d35e43b2f739b5cc83bad4dcaaf054ea0efbb3f9 SHA-256: 41382f523c1de280fff8449bb5f09bc4a63e7cde924548d19883576d9069ef46
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that function as a link farm, directing users to external websites. Several of these URLs point to compromised Content Management System (CMS) upload storage, indicating a potential distribution point for malicious content or phishing lures. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://infrive.ru/uplcv?utm_term=plant+vs+zombie+pc+full+version+free PDF link annotation
    • http://italianopizzeria-pg.com/uploads/files/12097637398.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/19480485309.pdfIn PDF document text
    • http://maksimetall.ru/files/fupolusurimokabu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef4ce31113---guxejiwufukulokot.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/lanuxagiza.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161474e4d113d6---90191465048.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/majemixejemaboxupokonawun.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/xesikigupazejolekiwotarun.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614879f83b15a---xinojewife.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147619bc2290---86905072986.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/88609981022.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/dupodukuroliku.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/74600173663.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161484a914e1b4---sanexutujipesupive.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/zetinesapamemawopidajat.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/35670171030.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/bogewe.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/24826511848.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/77210499690.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350af09a9bd---47937259422.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/kizuxe.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/78893761547.pdfIn PDF document text
    • 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_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 11008 bytes
SHA-256: bfdb061d650e6e9afa84a214764e16347d9264b4b14d22c18c90475e49085798
font_01_sfnt_off0001054f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 17900 bytes
SHA-256: c4d33e80fce996fb208c7413fa6c58c6bfb1e2f367fc867548cbc958a0f3a4f8
font_02_sfnt_off000133c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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