Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd7bd484ebf1058…

MALICIOUS

PDF

54.0 KB Created: 2021-09-03 15:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 44615c629b3c929119ee6c4c27f34cf5 SHA-1: c1ccfbe7605b900d2b4a72f87920b03554e0a276 SHA-256: bfd7bd484ebf10587208ed892e177ba56dbd56d2ed5704e558ae648e9254e902
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=happy+together+tabs+pdf PDF link annotation
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/7thcko1ff757bh14jf4unrjuev/bitozavajinixusutu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ebf86f2987feeb58a5ef59ad7d5c0281/14797243120.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/libosaxuvesasovubu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077ad7d204af---46391394127.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a78347dd7d---58047146039.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/48009663157.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5beb61f4c7---rakirorode.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/79201614976.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/ab8fde820517050658afcd56d3a85eb3.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/ganun.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4fbf0c7b---kodogadifapogiwumonujojoz.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/70100136.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/zidopidolep.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5b3099b5b7---tejuxudolikixokapibejiju.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/lojil.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/pulijemalawa.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fe904e2c5be9d370ce8bd4a9dfd2f0bc/16253776844.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/wawufuwosuwunoliguwen.pdfIn PDF document text
    • https://www.changhuapmo.org/plugin/ce1/ckfinder/userfiles/files/86338286685.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/pavaraxokasaxisepamer.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608097ecc1bca---najoxerepanosejodijivonir.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8ea5d03864553b6d87c00fc27be47d53/lowabizoj.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/d9ba5d4e6a3aaa95b98b392804f2d3ef/sulerese.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/xiferanowuvajiwamazuko.pdfIn PDF document text

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