Malicious PDF — malware analysis report

Static analysis result for SHA-256 7420a783625f380f…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 21:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 25505a64fd3f4cdf83fbbe5efcd82604 SHA-1: e38c89d3bed20eef8563d0dc228569b2bc489b5d SHA-256: 7420a783625f380fcb86a3a9383f075daa1756ae8f761fa99c8d1e487c31d021
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and embedded URLs further supports the attack pattern of luring users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=mumbai+disaster+management+plan+pdf PDF link annotation
    • http://krevue.cz/UserFiles/File/51795425105.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/daletilawodixosiwivos.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bce329cfb---21866336472.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081864101a2c---fotifugajojaf.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/65163741991.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/44759033406.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f281634cbef---pojojonemadomedexegorikos.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/16244029191.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/debutifuwatixi.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/jadabuxufexa.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/1d3afb4e44297140b231a1dde5ff575f/sukizoboxuduxu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0a78bbb2---serile.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/vuputogudidatukuloxefuka.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/49617544255.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/71736320052.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/85057420423.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/mixibenuxikurakosetuxu.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60f2505a9---jakatevoger.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/13215880936.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/farofinisekutew.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba5babdaa---65120590108.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/gifatomudezetavologivo.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/18135441024.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/mixopukuvukegiz.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_off0000c831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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