Malicious PDF — malware analysis report

Static analysis result for SHA-256 924ead60caf58c26…

MALICIOUS

PDF

66.5 KB Created: 2021-09-20 07:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: af83846755f06df7b6ab01a41561149e SHA-1: 6ff0fa8f6ed58fb6b16725589829aebb176795d5 SHA-256: 924ead60caf58c261fa89715a8cc0752dd38ef69d14fb1bd189909691fa9957f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. Heuristics indicate this is a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6714

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=what+is+the+8+second+rule+in+basketball PDF link annotation
    • http://eko-baby.ru/userfiles/file/11896466332.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/32157920673.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/webakiderisutezuvubixizi.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/26069041193.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/42437961986.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/rakufuwa.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/55892484708.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/54095480376.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85135926407.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/vuzip.pdfIn PDF document text
    • https://resicolor.com/upload/files/xefuporobadodo.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/bidoxikif.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/vixawabosanew.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/40429129050.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/zizisovugikatupug.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/tomiwasarimigapurupatati.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/70894422394.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/16918512759.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/9988406386.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC99 11000 bytes
SHA-256: eff1ae4e11df745ee4532b62c6c07edee00139e4317cab88696f48ba312b5f4b
font_01_sfnt_off0000d625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1