Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed49774cc34ecf70…

MALICIOUS

PDF

79.0 KB Created: 2021-09-12 12:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 830b79374f618282980d1f342336e498 SHA-1: 330982cfc359186feaa2050917c0e380bb03f5c5 SHA-256: ed49774cc34ecf701e2ebdc1cb3ccb2ab84acb87b97efbcaa44fdd0554f5ec0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm pointing to potentially compromised websites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external URLs and the heuristic findings strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6141

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://orsam.org.tr/paketler/ckfinder/dosyalar/files/24600863357.pdf In PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/13962824336.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161341364db9ef---19667114413.pdfIn PDF document text
    • http://orem.mn/uploads/files/97519770652.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/9570505640.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/mowokabedebetebuvazere.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/napawitofepoku.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/37149256903.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/709505574.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0046cf347---nilijof.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/tuwudo.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/jewaxiruki.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/zitad.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/xenofug.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/61988931804.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/vadufanuriwekoselagix.pdfIn PDF document text
    • https://migger.dk/userimages/file/20357758708.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/17829894016.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/romevemebugudovilur.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/sejobe.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/23905106656.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/45253965973.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/06f895c9142026fb760812194ba6372a/dirukiwegurado.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/49418de203b131f1efebaaccf8269591/6423432704.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/vomewasifemajozupun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=create+new+email+hotmailPDF link annotation
    • 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_off0000dde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE7 10324 bytes
SHA-256: 08cfbe84b39f4e22610d902fa34e4d7221b579d2314f0655ffed6e6ef7f8031c
font_01_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 17940 bytes
SHA-256: 78e0da92323fe11a7f7531f8cd110584fde5b678f3ab65edecf99183cd79608c
font_02_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1