Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb519279a3eb2d4…

MALICIOUS

PDF

44.2 KB Created: 2021-07-26 10:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 012b87f7e5b167e44a978a10a17a507a SHA-1: e6845e17356df527b147d1c3bc4b72e89abdcd13 SHA-256: 4eb519279a3eb2d480c3ffc59acf4fd1894f1230cb293ee6921bb787125fb1d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of numerous PDF links and the overall structure strongly suggest this PDF is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7749

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 http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/62361063193.pdf In PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/0ndsjamfmsi17r67a2tkrk63j2/foxumozuratepixun.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/korelanumalak.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c075324e6c2---susaburovitomafadefozix.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e61a317b9c---78039825203.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5osodonv3kiep9u16ulkmrsim4/vojakipumupesodin.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/3716294648.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/d4vdid5avrb17pve456hofvo1g/ribedimof.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a9c263b9b---58169423828.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aab5cc96364---35726935102.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e41a645b4---mogonitokerubazudud.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/eeacf21013e4d47b28448ce5214f0d73/fusizovuvavoxemusozeja.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/fozovojififefak.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/40349800012.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ed123dddb---75369284547.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e042ef0cb2---fonuguz.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/ruwasufoguforif.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/26584974841.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/pemururi.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2c3522db415b4f49be6d4c89f05c4af9/90893424154.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/96613406775.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/12a22290d0124a4d4071c90e70d93317/petajazijusagolelidivud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ygnacio+valley+high+school+class+of+1973PDF link annotation

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