Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2406142960555a…

MALICIOUS

PDF

61.6 KB Created: 2021-09-24 06:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbdea84b8fc525d12f130c5b87fa5c0d SHA-1: 710a1fecb5f7755e7df87227e969045d0d795c50 SHA-256: bd2406142960555a18d4de4cd02daa39298c9ef64ced3c94323616ded791f3e0
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Heuristics indicate this JavaScript is used to redirect to external URLs, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7942

Heuristics 6

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://michael-dhom.com/webseiten/file/zatolubaxupoxukuxugadu.pdf
    • http://kcwoman.medsoft.kr/pds/userfiles/files/1520197599.pdf
    • http://bxbrdh.marketsearching.com/upload/files/72147687087.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/b8877a4877054200b554574aa103baac/vaviturozamilenifum.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/8bd4b4d95d58f66d88c78c25201686ac/6477522721.pdf
    • https://betamachinery.sa/other_files/File/daxonup.pdf
    • http://hondasushi.com/uploads/files/jusaz.pdf
    • https://batikatravels.com/userfiles/file/fuzuragenavoxafid.pdf
    • http://houstontca.org/Content/uploads/files/88803940382.pdf
    • https://cfaegaianascente.pt/portal/userfiles/files/30809252925.pdf
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/fovilupigerabisupuwo.pdf
    • http://dtjxbpzx.com/filespath/files/20210918113234.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16147c6798cbc7---42315989548.pdf
    • http://gbfrjournal.org/pds/userfiles/files/vomujokamonasamojolowire.pdf
    • http://gazetavk.ru/img/file/nobakadifizebovokiwetiw.pdf
    • https://abctranslink.com/ckfinder/userfiles/files/21253199871.pdf
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/69021589070.pdf
    • http://studiozoppini.com/userfiles/files/guvilamadit.pdf
    • http://ottomaniantextile.com/userfiles/file/lukogujotuxamipuvifedi.pdf
    • http://massimosusto.eu/userfiles/files/jidunafop.pdf
    • http://www.motocams.cz/ckfinder/userfiles/files/79365622493.pdf
    • http://insuralead.com/userfiles/file/vodenaseketosajugejotegab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=android+sdk+directory+mac
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 16792 bytes

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