Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54d8a9291754a7b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-08 23:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dcacc3d50bc808e913f72a6e37811f80 SHA-1: a35067801f0fe1a93077e30c1e20e2756270833c SHA-256: f54d8a9291754a7b27c74a7745bcaba8107f2bcc89f2b742a5a8f1460f919504
132 Risk Score

Malware Insights

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

The PDF contains JavaScript actions and numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The primary URL suggests a lure for "robux hack no human verification", indicating a phishing or scam attempt. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://cructi.ru/uplcv?utm_term=robux+hack+no+human+verification PDF link annotation
    • http://abwlondonblvd.com/uploads/files/dirus.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/30720313380.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16134278a38f93---vejerame.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/miwoxodilab.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/gotuxumu.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1c80669de33b64c7133a39075ff358c5/sadumudikaveso.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/7882696951.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/38d066a5d524acca535cb1fc47007258/larorunuloveme.pdfIn PDF document text
    • http://afro-safari.com/upload/files/nikosofajulezajezevugite.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/wofopa.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/vesipokiju.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/38689195874.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/lagefe.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090506031218.pdfIn PDF document text
    • https://hgb.se/filer/file/50645518877.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kelimutuxaturovenidapifa.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/tijovumuposixe.pdfIn PDF document text
    • http://tfforming.ru/d/files/tewowamunamekadudoxoper.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/15111342213.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/18405899885.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1d832d967b21065df02c629678b300dc/fivabev.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109050828106849.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/nalenawixo.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/gipubopatafozenudutujiba.pdfIn PDF document text
    • 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_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 10932 bytes
SHA-256: 962a47bf7f8c90c9c409e688ed49a959f9d26690665e5bff2c92f41ebef18bf4
font_01_sfnt_off0001110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 18488 bytes
SHA-256: cd25a673312e7c975e3eb5ba7311754ccbcabfc830f67ae149d1b9760e110a0b