Malicious PDF — malware analysis report

Static analysis result for SHA-256 64443d87d528b26d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-01 23:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c13289f6452ad1225464dc1f2f68dfc SHA-1: d9f9b4a98170dafbd7b23c61148326496f739c77 SHA-256: 64443d87d528b26d367637f75f5b6016220f1af22e90b4977e12de12416a510c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://smidgel.ru/uplcv?utm_term=all+the+barn+finds+on+forza+horizon+4 PDF link annotation
    • https://meganimal.pt/site/upload/file/97287810150.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088eec15add0---torinenuzub.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/livovaranewanozifoxu.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/9878302404035b62015a443582c8724f/zopagafefosofukexuvabobet.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202107280554059465.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/25243412056.pdfIn PDF document text
    • http://askort.pl/Upload/file/9549073793.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611ffd4bb712f---22716676409.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/lapadixevaladutoru.pdfIn PDF document text
    • http://siembra.me/uploads/files/nojad.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/51365490165.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/94404387784.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b07dfeb1bb2---72482286267.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/lezajo.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/pukoxuludukeruwi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bcdbad20e---xixonefopasarasukur.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/jowuzexunoruzolazoxaw.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f079517ef---9670141498.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a267ff46424---63775734973.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/18293264984.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/78079935758.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/bagogobasupesukojen.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c10f789f5f---laguwemetoviboxebaxon.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_off0000be2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2B 10712 bytes
SHA-256: 4e3388c56ec1c7696d2e2ced81cb58767d13324feacc32b7b9a76886567f493a
font_01_sfnt_off0000d6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BF 17628 bytes
SHA-256: 3cb953e8178bd7a3ab901e946e696b3cdc4c3d704ce0da24b3e681620bb0f8fb
font_02_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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