Malicious PDF — malware analysis report

Static analysis result for SHA-256 3046251e5eaf6211…

MALICIOUS

PDF

64.0 KB Created: 2021-09-08 00:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4662dc780071b0dec5935df9984779c SHA-1: 29cea66460dc8a9e1d361bd375e8f407748813e2 SHA-256: 3046251e5eaf6211214ef9cf052aa75dfb3026283bc3f34f2f209b719b99adfe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting sites. These links likely serve to distribute further malware or host phishing content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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://kimtuong.vn/isc/public/files/fckupload/file/89678623376.pdf In PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16084390087ad3---lazivivuk.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/63070190786.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/lojefaxakobisa.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/30533452429.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/19759210796.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/bumelajufukenaka.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/71293960333.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/2361661bef6aced7c6f31d32670c121c/rufav.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/zozavivajagunavazima.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/u5lkgereotvh8miacrlb2es8o7/deverotek.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/0oood7atp36qk536m63d7odmdt/42155142588.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/24275098250.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607626fa55d24---28913970324.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/zetulovi.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/vevuwunadadirepuweku.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b91b87f81b---56837345614.pdfIn PDF document text
    • http://holzbau-napetschnig.at/13198354957.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/27247871622.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fab40d87d---lujovilubutunopozojaru.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/78715866151.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607446bf02ad5---rateropuzipelotapekata.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7759cf057e350cd171b54ad999e21bdc/80159404713.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1cb12f3d4---pipaloxuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=whirlpool+ice+maker+gi15ndxzs+manualPDF link annotation

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