Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d44ef6a76b945b1…

MALICIOUS

PDF

68.8 KB Created: 2021-09-02 04:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0dd96d4abcb8f359e8fdd7d441f18f63 SHA-1: 77dc92813e693c91ad5c35334bf9e133e79bb27a SHA-256: 8d44ef6a76b945b19b0dee30d9da1e8a8f94eff196df0d102132c5fd9b293e1f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 5

  • 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
  • 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://www.bash.cl/media/file/52376729212.pdf In PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/72bca11abe9de3efe506d9620d5478ef/moroguvudogitu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a23d4a736b---76894263489.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/60721263348.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/lalevowodutabosananuda.pdfIn PDF document text
    • http://aweibel.com/Photo/file/zovakaz.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc24fc6118---vunibovut.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/43570792700.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/248db5635ca78660a04ac20e6c9dc4d9/pokapufabu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/59654068214.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/derobimijiwugojo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3bae15af---kelenuzanukefu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a685de05c7b---30628223183.pdfIn PDF document text
    • https://topupdana.com/contents//files/60597148648.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/depenenekoge.pdfIn PDF document text
    • https://faprosid.com/file/vexesewizolatikuperaje.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/xulajagofel.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/82236258444.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/61577287400.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/waleketodozazusa.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/fefikumopoxoranaxasiz.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/epg4qplee4n22ng5d92dbrl88r/26536410079.pdfIn PDF document text
    • http://chineseclothingonline.net/File/wororaxumidikinirenoropi.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/682751f975fb437840af7d0a1b3187b4/busufekuzuviges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=usertrust+rsa+certification+authority+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 10880 bytes
SHA-256: 7d45751c462efa14d09d64f3c9ab6e2026ed8523445495e263e25a9995a4daad

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