Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfeaefc76f993edc…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 23:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 798e59855c705c9ba62154fe59518902 SHA-1: cfee98b3c12c7d398baa0ddd12cbdd574182b4ee SHA-256: dfeaefc76f993edcd897bee675ff3b17bbd4fc382e627a09539f60613f155d62
162 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that triggers redirection to external URLs. Several heuristics indicate the presence of a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

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.
  • 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://coretry.ru/uplcv?utm_term=icloud+notes+on+android PDF link annotation
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137d0f50b996---pivupefofagujusifizexux.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/kisugin.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c315f41a8---79763392343.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/9v6iv1632e0via8lb4jhcgi193/sibubuwarojafatigobinuvef.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/51796443632.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/vominoledoxaligezewatumiz.pdfIn PDF document text
    • https://bursac.net/userfiles/file/bosivumumipojat.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/nelijogimejujotav.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/goxexinibatotuvelosufi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/13d1ccac2309927bd8ef87f18cbeb7b9/lijilubunuvarubew.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/balowipelisoluba.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/f063a8b51fc442f0fc514a82850f460d/dajule.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/bodutaxisuzikevipa.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b958909e1054dc024bd66b128fd536f8/67113127617.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4e5abaa1a---tadenutiwewowubavatafupug.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/20056947366.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161489b880f0a5---sosebodenix.pdfIn PDF document text
    • http://vaynhe.com/upload/files/33265630141.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/44224526569.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/milodevilukifal.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed473d62aa---97392028998.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/toxowozuxife.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/pexivulejaruzenazo.pdfIn PDF document text
    • 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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 17616 bytes
SHA-256: f43864c862e4b87a755aca996825bedb744ec8ad3a1051fa93a040a52cac2fe4

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