Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a1fd54a25437b4…

MALICIOUS

PDF

51.1 KB Created: 2021-09-07 04:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0839fd00e154e647f7bb9d9d03153679 SHA-1: 1144dba2ce75e1fba92ae5c83994e69c7f18ac6d SHA-256: 84a1fd54a25437b484b16f42c4d925d73ce445b892975ad0d1c055e7eac4e978
154 Risk Score

Malware Insights

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

The sample was identified 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 various domains, many of which are hosted on compromised CMS uploads or disposable hosting. This pattern suggests an attempt to distribute phishing content or redirect users to malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6983

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://www.halpellet.hu/userfiles/files/zewowi.pdf In PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/57347985124.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/satatutofopebaxi.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/13757814921.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a88b0343df---74716538058.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/mupajowo.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/fc8cb5676012d8315e5c93a32f42fa88/dibipo.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612383c7ba11a---guxaxovobegutuga.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/99761215191.pdfIn PDF document text
    • http://favourtec.com/attachment/file/guduz.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/12e226972f8c3598ae718b080a43dca1/segodejolitudexu.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/63611914953.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e7e8cfcbf7f3fc4e321d40ad7fe71be6/dovedaxerevazixuzep.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210728084904.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/gexuvulisibojigubexonot.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/28008116974.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/xaxobij.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/27705999097.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b86971ec4eb8411b690288a2fac66c6/jexudaxagejot.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/89637620409.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/bixaboputinurisegufopeza.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c605dbef0---44156641708.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/bonusugu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8a29c12de58a8ae4182a9c204ba06656/73528734189.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/76911523564.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160e4beb4594e8---wugis.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/cin9186inoiugvknfqt42rq8f9/nurabavazetibem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=turkish+language+course+book+pdfPDF link annotation

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