Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3f2f348b30cfcf…

MALICIOUS

PDF

62.5 KB Created: 2021-07-16 05:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 49afbdb9235712579b70797060f1a384 SHA-1: 35fb4cb7b9cfbbc6391070175d75208a1cf37645 SHA-256: bb3f2f348b30cfcf9b1a3a04c14d3b7d8f15c12ba10438db3898ef7a1b540c0d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, directing users to multiple distinct hosts, some of which are compromised CMS uploads. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded JavaScript likely attempts to download and execute a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

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://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b77a9e9f8011be8959e8f91744988dae/63976867611.pdf In PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/44712146351.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/5920248899.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160badc5424d6b---18353517414.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/supadilorujijufa.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a72ec17b7---woxafivodoruveledi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/33l8ud6gq40pm440j3mml6dsbv/fasenitedorekigu.pdfIn PDF document text
    • http://hnspkjx.com/d/files/80906522776.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/kexonobiximazaw.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa324abc1d3---vogafufo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/sehqrnk02u9eot14ds04foqfsq/68411324578.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44667da466---16356730464.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/tukubabijukubelige.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021052218483930.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/79933583144.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210713124333.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/nilakolo.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/56077143575.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c881fd79a562082527f8069989cb6bbc/veloluzi.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080d5c455e44---41219577130.pdfIn PDF document text
    • https://soechi.net/userfiles/file/xosujebebozadewelafep.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2ab1be8f9---jedinowimugigipuxebonus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dw+text+meaningPDF 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_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 10208 bytes
SHA-256: 69aa5a2a84a12da07507ee1ea6d0e6d0b06dca7e9c1ebc0728e47663a68e051e

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