Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b433d12394fd985…

MALICIOUS

PDF

64.8 KB Created: 2021-09-03 03:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f35e29e90c9b5f7c17f578837b4d6989 SHA-1: 4ada490794eb4d809dad420009467fefa90d6b36 SHA-256: 7b433d12394fd9856ae6952a219a78cf1d657d15dc3642764f79e267ba9c7fbe
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. This script likely redirects the user to a link farm hosted on compromised websites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The presence of ClamAV detection and ML flagging further supports its malicious nature, suggesting it's a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8344

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.
  • 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 http://soupworld.de/upload/file/fagibitidopavesel.pdf In PDF document text
    • https://socohoteldanang.com/uploads/image/files/bebinosezibadenasotumap.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/95350325307.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/31772713108.pdfIn PDF document text
    • https://appfacile.it/file/74570845680.pdfIn PDF document text
    • http://yjccnc.com/upload/files/8942761888.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/lijuzuzokijojig.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf23498ea5---85957527353.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/tobiwuwadot.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/86c476b4db9406cf5a1d421b02bcfd51/70366583090.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927b1fd1195---12756835298.pdfIn PDF document text
    • https://activepymes.com/pub/file/16809002004.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20218251849126354.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vukutejugexedilituvonowew.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f38db21af---76822833603.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/43303911310.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/412e1bc7ba3efd7e5465448e3ef34fa8/gotetopofalemu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af4fde8e43b---11043488778.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/90282000566.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5bca153efc142b68f11115fa4765043b/54167088622.pdfIn PDF document text
    • http://asustainable.com/global/file/wibopawojusudukixegeku.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608312ebe4209---puluworubawagaseje.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/salet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sma+10kw+inverter+pdfPDF 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_off0000cab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 10820 bytes
SHA-256: 95a21332a14b8259e5bbfbbb1faecec3c781a74e85ea4abab8074367286b841e

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