Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f269900ee605a06…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 04:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cf8d785bf8571653b18baa739a66913a SHA-1: 4d503720577a46885cc7f0f4cb59089a382bc9b9 SHA-256: 9f269900ee605a06e9e2980613ccdae1832f9450936d5f34e187799e164668e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised websites and potentially disposable hosting. The presence of embedded URLs suggests an attempt to redirect users to phishing or malware-hosting sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/f12fi4qv6ju41nosb7r97368vo/88950610950.pdf In PDF document text
    • http://st-johnson.com/Uploadfiles/files/61203805153.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/19836999995.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/62440531320.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/8917351873.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/puzigasexonogevobu.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/56885018044.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58b44789e---gibuwujijuxubok.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/68207374d5e19fa56f8bc1a3344cea5e/99212693324.pdfIn PDF document text
    • https://majubesar.info/contents//files/88675573091.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/17022687384.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/tewavofoluwaxisegewa.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/magir.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c53b17345b---78419062502.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8beeabed---81181282777.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/pqm76k6ljtog34hlsght5h52si/45131214423.pdfIn PDF document text
    • http://web5gstore.com/Files/files/86413890026.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092869315c4c---zijowo.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/bowar.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed2ee9e348---zosiwadosezuxugiw.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc96936564---25404639968.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/gadufuxaborubus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ansoff+matrix+explained+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 17768 bytes
SHA-256: 8b0a9405da4b31a9a17dc84c7ec7c51ccbaa14c35207b80c4a0b33f06df2c96a
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001206d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206D 10740 bytes
SHA-256: 6b63f26eb27b634a444930a0ce35685164faf23fe7cc554c134e77f19212c762

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