Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2142753265daea2…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 10:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 85fba46a7dd037af4cdb74d2ce4ae2e4 SHA-1: 52e3468ef949c269da3124829430efa2ddd28377 SHA-256: f2142753265daea2d52dcb853605991823affc7a81238d5f5023d5a162b65031
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous URLs, several of which are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to obscure the final malicious destination. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://9275522-travel.com/userfiles/file/vatodikiruwofawiva.pdf In PDF document text
    • https://publicbridge.pl/userfiles/file/paduvebofabubofajuped.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/4312101322.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/sujofijik.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021072401241234.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/80530621499.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/mekosujidemapozufiladiwi.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/70798514711.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae8e41789---1612870287.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/39281654979.pdfIn PDF document text
    • https://dineflon.com//files/58419067250.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611069b863987---61206465419.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/poxefuzenufatixew.pdfIn PDF document text
    • https://bonacorsi.it/file/59362376983.pdfIn PDF document text
    • http://khocabien.com/uploads/files/bubaderutumujekani.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ae6f27aa0f4565262039c109a70a4d62/poliwigokonevedaza.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/83113297092.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/tikiwijowufozegakoxi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/poxuralukudanido.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/rikivuzigip.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/69393569484.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae93a6a53b5---34307049010.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/nizov.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/nunejax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ps4+user+manual+pdf+downloadPDF 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_off0000e5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CF 18336 bytes
SHA-256: 304d0b89b0f4a26e8b23552ed1d323cdedcb282d18c6f02c6357d25efeaf5e68
font_01_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 10732 bytes
SHA-256: 314dc01e05d12885b8e07c5b441074ec7e4fc7c23b961ff10aad356098e5f165
font_02_sfnt_off00012dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1