Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d85d8f740edfef…

MALICIOUS

PDF

76.2 KB Created: 2021-09-14 14:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 509c7faf3f4b30bf5e10cea22a6cc5b6 SHA-1: d2eba4949f83d981e6675de2e321af3d73ee71be SHA-256: e7d85d8f740edfef1502c118b62668f7feaa809c021a1c3605674e2de0bfb384
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5451

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 https://philabc.ru/uplcv?utm_term=superman+gta+san+andreas+cheats PDF link annotation
    • http://gammatradings.com/userfiles/file/remozoxunemuzesonegimavo.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7dcfc739eb7f850c39e854d927ffeff2/85134127914.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bomenukiwokevusipazunafow.pdfIn PDF document text
    • https://kimcert.com/E/file/rudapubosiwexilep.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/39938796308.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b5902196d---12856854809.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613a78a6bf2be---41535498616.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/36712230537.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5vnlfrvh3kdgrg514rlmvlo123/54931518570.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16135e9080395f---24313732726.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/75866ba2369931163f49be3c13e452ef/11744471916.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/98236110664.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d9a5e285f7f1c697c3dbbc900c952026/40563841898.pdfIn PDF document text
    • https://fobh.net/userfiles/files/vokefuxukidenisetezaxurum.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/3464643943.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/xewozadibivoke.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/ditefineginabutikobajegu.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/32523549303.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/wasoz.pdfIn PDF document text
    • http://mgrima.com/files/file/voxotibawulelibotaramazik.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/57673339061.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/33583231980.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAA 19360 bytes
SHA-256: 36af14dd15abe9d2bb194ab6466769ef11a0864de80f17dc53267953ae15e32d
font_01_sfnt_off00010253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 10880 bytes
SHA-256: e18186c9bfd3293c5532e5d25751121b97876d8f67626fc52b94435a547efe8f

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