Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7138aa9c098831d…

MALICIOUS

PDF

77.6 KB Created: 2021-08-18 13:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 14259b26078bb7035cd20b290d0894ef SHA-1: 44f34e8cd93440315c3d67acc73e1f6e0ed0d10d SHA-256: e7138aa9c098831d90085bb179dd4413931eb4e2ab7eaba3bc8645822da9304d
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the heuristic firings point towards an attempt to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7301

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://ludifrance.fr/userfiles/file/sivovuxijazujog.pdf In PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/2957824172.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/48841087248.pdfIn PDF document text
    • https://agatanorek.com/files/file/62256387200.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/96859483190.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608975b6c6dcf---32668918906.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff00f66ff6---8369573539.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/ribaran.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2729593a42f003db3073f7d4a7cd046/fozajajisotokajirugo.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/wufumosubokuzojoluzoj.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/23296041738.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160914be9bdaaa---71123435225.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5951e9af---magijibakedanisodaxebari.pdfIn PDF document text
    • https://led7.ru/file/rogonimefawelobikerixi.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/83569615142.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/d189544d9e59f056dd98e119a5b2d710/vuluku.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/9d9d52a11a9a74b53a36a6843a42ae0b/30807561263.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160acc770bf865---23860702667.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/xipodi.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/10e686bd19a194c88d87480006798463/50475011037.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079e59119187---bavoxatititogopuvunejad.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c144b1cc2d2498e6042d56879973bea0/mejijuxoxuremagetuzavub.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a995c31e257---30225611431.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210613230504.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/95273832603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+far+can+you+kill+a+deer+with+a+6.5+creedmoorPDF link annotation
    • 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_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 17388 bytes
SHA-256: b6fb8dd1704df0e71703c6e74b478222884e9641156425adae7fa38296f1c012