Malicious PDF — malware analysis report

Static analysis result for SHA-256 94735025980af39e…

MALICIOUS

PDF

67.8 KB Created: 2021-10-07 18:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3009ae01cca9fb61055938b1907d0889 SHA-1: 4ecd2008da3c31c5d3e48e8dadf67a5998385788 SHA-256: 94735025980af39e14df2c9516071c4309051835c0e35ea84be25ea1667cb1e7
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting an attempt to distribute further malicious content or conduct phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615193b52b1dc---nolaxomekutiwozawapep.pdf In PDF document text
    • http://th-hl.com///upload/files/85258571573.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/200949515936.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/90533241368.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bezikodutalis.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/74293447636.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/dedaserafabaxabo.pdfIn PDF document text
    • https://kermanrooz.com/img/files/55114289668.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/1b8943b0a3eada745001e66e1b19bde3/kenojuliwibuxagezifozera.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/sezomukobemisutikamiwoma.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/49042788434.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613baf9ad2190---9245468483.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/rudezoma.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/83060715375.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/57732935465.pdfIn PDF document text
    • http://knipia.com/userfiles/file/busul.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/mat4g610j8ms93o310hu3jfo3q/75185377734.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/49514046894.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/xejepigumajodul.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/fewurozomega.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/rupovuvokigulojefopijug.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/22116422489.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/suradidazewovavokusemat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=latest+bollywood+songs+2020+mp3+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 11256 bytes
SHA-256: 1ee4631aa583fcea9c9113f5cfd4310881cbac399444b954414a0cb6cfb034a9

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