Malicious PDF — malware analysis report

Static analysis result for SHA-256 08db990a9e9e20b3…

MALICIOUS

PDF

79.7 KB Created: 2021-08-31 20:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c5f2d51315cacf2c43ba5563b042d00d SHA-1: 71565326eca5e87b638459a0b79a78084b1fee9d SHA-256: 08db990a9e9e20b30d5cd80994d9caa5214aa961767ecd175253deef4c12f4e0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://moto-bike.pl/userfiles/file/zukapixijutifikuzug.pdf In PDF document text
    • http://dichvu12h.net/userfiles/file/lipav.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098477d8ad5f---89066895664.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/slrko5i7o8luie984t2cardsko/1762490083.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160900097229d8---83586223674.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbdd06115---21691706217.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/72488611025.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/liburudufuwitomenevubiwo.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/filebawenedegi.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kopotexilemivasewuzedoki.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021731215997733.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/bukixudiropiroke.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/nokuguka.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/damixefulasoz.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/621be348b175f179de7184499eacefc7/juvoliwipipojusasubovuluz.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/xupubajejipajokafa.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/27078979010.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/mamowose.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4oth5n214qkchqd450vmej3qgi/36883920431.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/duxafovuvejolewijakemopo.pdfIn PDF document text
    • https://dcimx.com/files/wuxikamupiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=funny+stories+to+tell+a+girlPDF 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_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 10472 bytes
SHA-256: cade20900f325a2b0658d911a81ed2f99e4e8d74b64830c1cc334886b6415b6f
font_02_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 18932 bytes
SHA-256: a7e32a57e7bf3aa7ba9b64a2e422be3fddc310672e9fecf8f001cb1a1b26ad5a