Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40cbe91bb878598…

MALICIOUS

PDF

49.9 KB Created: 2021-09-17 05:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 248193e2f7b1f6330c2a7843204f1a3c SHA-1: 7a91d881734a94eaa35813a11b1fbe59fecd8d8d SHA-256: b40cbe91bb878598a8f0d0451f025ec5770458b9d41660cfef12e4be72c4a27f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. It contains an image-based interface with a click-outward action, directing users to various external URLs. These URLs are hosted on compromised CMS uploads and disposable domains, suggesting an attempt to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/66318548562.pdf
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/51775267290.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139138223cdc---lemivadudufakedoge.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613363a8a1ba9---23655397657.pdf
    • http://vasekurzy.cz/userfiles/file/kefivibapamanavizes.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3e28e00d925c5c85ff7d89a18267f0da/82767696903.pdf
    • https://mimpiindah88.com/contents/files/vuvikalebinakiximadop.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331a1d95338---43457433293.pdf
    • https://cahayaapi1.com/contents/files/digebotuge.pdf
    • http://aasghsflqsae.handylover.com/upload/files/xamokilusigan.pdf
    • http://angel-conference.org/upload_fck/file/2021-9-7/20210907090157123997.pdf
    • https://officialbacknumber.com/editor_up/16580831207.pdf
    • https://kurek-rowery.pl/user_pict/file/wenakemijale.pdf
    • https://promaxsuspension.com/csmimage/file/xobokiz.pdf
    • http://giaydantuongphongkhach.net/images/news/file/61898162573.pdf
    • http://naoshima-habitant.com/images/blog/file/96039941935.pdf
    • http://szymonadamczyk.pl/uploads/fck/file/94920080951.pdf
    • https://ylwlgwadmin.ylwl.cn/upload/files/21580335398.pdf
    • http://dalnoboy.net/data/filestorage/upload/files/xefinurazokolezuwogogi.pdf
    • http://k2plusinterior.com/userfiles/vumukuta.pdf
    • https://mmeasar.com/mmeasarfiles/file/lunakujowomexogedufe.pdf
    • http://sakurahoaanhdao.com/webroot/img/files/91423629173.pdf
    • http://royalwedding.jp/images/blog/file/10473386719.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=if+you+hopped+like+a+frog+pdf

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