Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d88c228bc799c3…

MALICIOUS

PDF

77.2 KB Created: 2021-08-10 07:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 24555aaa06452738506b11e1b3909d1d SHA-1: c452f8aa06caf11c0599410990d5708073c8c46c SHA-256: 86d88c228bc799c345695b28e12142e9505050a702e1a4ecc75f7a020c7476cb
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to phishing sites or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9238

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://guoyangmoju.com/userfiles/files/xozowofu.pdf In PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e5d4267e872f32a86e9820e52d60113c/sexekubak.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/78354044962.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/sudilawavefetipidikiti.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/g6t0d3qrtc2sm2hh64b2im2f55/xenaxufuvisefojajuwux.pdfIn PDF document text
    • http://agavietnam.com/img/files/fexisapiviwuw.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c51ce02c01104f320c9b1a3626ad3c20/vumivuvebebubekofevok.pdfIn PDF document text
    • http://dentherapia.hu/files/file/pixedowudebafeguj.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c459d7316a0---juxelenumulebavixag.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pmniea0vsf0gkuksm5topc4kr3/91080112279.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908ba0b448e---namofutemem.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/rudunikobufoxige.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/59537161160.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b1fc1cf5---dawosezowuwumitumilidutu.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa2595aeed---36369707761.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ec01bc9d99c63ae4e8ed8a51a3ddf13e/25231889127.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/21710850550.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9a859db38---lovasiworemefulunale.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74e9b1000---93227484946.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/sizeruvigel.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160783e8d5dd44---tezinigiwo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ed7beba9---mixugim.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/3d0rfatc298tc07ia1t32gq7em/7883819751.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/bavewoxel.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/rr7qaphleu9mbv4gtlo34fkjo4/jewolajulif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=canada%27s+national+sport+alongside+lacrosse+word+crazePDF link annotation

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