Malicious PDF — malware analysis report

Static analysis result for SHA-256 2871b143061e126d…

MALICIOUS

PDF

81.8 KB Created: 2021-07-14 03:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12fdd534b361d42d3b7e3f944a801b06 SHA-1: 4c8518c28ffa838bb907ff1711ec3a54251e6464 SHA-256: 2871b143061e126d51c44c6e859cbceda7635d94bfcdc12f433961d7d9ce020a
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8889

Heuristics 5

  • 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
  • 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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d828323f1---66740911154.pdf In PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9bde7654f6025ec557156d680f3173a2/jexixozuvif.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedf52d9470---62793693954.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e47c79155---65653890560.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/27937296056.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce521e9cce7---2635002294.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/sezizilejosufofiwolum.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e20f8a117e22774f306bbf7ef0bf3898/wulifutalitexusixijoxezut.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/5fa2c35cb5deef9052655b8cd6398b5b/18149110043.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/988ba79fe828d4aa1513cdaeab458fca/31583400429.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/93866807629.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2225214f3d---13819382835.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/25042162934.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/52081354965.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/7bcc3a3e6de381913ff7058b54215839/86986258451.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/jemozijubir.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/f70b6ed720e28deb543b503ac26dc62e/4298465097.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/82438582525.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/puxurumu.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d51927bac40---rifezezesetubedepakotone.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/66417696745.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/lefavabozeretu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3dce03a9a---fuxodixakuxitexesatojof.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d88c19e34---bonivuzet.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16079c7d51cf71---12247072082.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=most+countable+or+uncountablePDF link annotation
    • 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_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 10364 bytes
SHA-256: 22b33d8be9fd4904183f1bec185f99211d23ded39712ff0d74ecb0abad4236c5
font_02_sfnt_off0001257d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257D 16128 bytes
SHA-256: 76ae7245978670f77437351ba543d6a778d86b3bffd3577fec67cb4578ee6d24

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