Malicious PDF — malware analysis report

Static analysis result for SHA-256 478e087bc950c707…

MALICIOUS

PDF

99.0 KB Created: 2021-09-05 12:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 98953897d63524e399e612848e8f4a13 SHA-1: bea2c935a898bc949b67348b8258dba34bd59642 SHA-256: 478e087bc950c7071335ff2a97d26e446ac8354e8016933254812a7b6b4e8af3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or host malicious files. The presence of multiple external URIs and a link farm structure suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/4dc1a6268f5f5a693dbf855ef448126e/masuz.pdf In PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/wanufudowefigixeni.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/sowomejosamuxevar.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/kupedalarakezu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a79758513e---bavenapofomulimow.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/25254031232.pdfIn PDF document text
    • http://tele-video.ru/upload/files/3918963440.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f53ac0aeb---digifabapenipuxaxuvibe.pdfIn PDF document text
    • https://digireg.cn/upload/81891021340.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/96490294833.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/14076387394.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0096147c---51979064510.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/72773020779.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e3e1d0f47ba1976a68d73b07cb680174/6510647058.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c46467bcf---matapevujegapa.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/sugaba.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc810b7fceb---gusitipulilagobonuxita.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/95095545020.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a405ca7ed410000884b17a8eb2e602c8/13308836065.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1245ac8f0---25808346781.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086592968735---48920464263.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/73948624683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=por+outra+globaliza%C3%A7%C3%A3o+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_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 21156 bytes
SHA-256: 986d5a2922450ec2cd155b5418295ac13a89800d70de5fbe112b058b1f2ab2ef
font_01_sfnt_off00014bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAD 11036 bytes
SHA-256: 79123dda9f1325c73b9437dd4651a3cff5a63de3045add759326f0d04481ee2d
font_02_sfnt_off000164ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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