Malicious PDF — malware analysis report

Static analysis result for SHA-256 88eed2d8ecbe1a7c…

MALICIOUS

PDF

76.2 KB Created: 2021-09-18 00:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b863d7cc23ae8adfccc0c989ce05dcbe SHA-1: b8040241b89ab56aef417e9959a1d53bac459b5d SHA-256: 88eed2d8ecbe1a7c35ccd4e124246ead9e8aa162dce27bc9fe1a4c5f80b3a6d7
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8582

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=quiz+on+android PDF link annotation
    • https://vico-domrep.com/ckfinder/userfiles/files/39278297081.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/zageke.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1b73b5229ad8342b8c990e75297fcc5d/4614787182.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/lobelitasevomirokizapogi.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/febeperodu.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/pakuj.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/towuzixivasavokotesuvara.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ju0h58si059l5kv45l4vgfcnq0/52853097465.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/43023527065.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/xipekaremogadezixuwele.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210910170629126.pdfIn PDF document text
    • http://fruitvita.com/files/files/xebetewojerig.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/86644462165.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/xujefaxari.pdfIn PDF document text
    • https://istanajp.com/contents/files/wazunap.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/bafuxokovalokar.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/tifopobavajixunopuromevog.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/zogowuvazafubefezemenemi.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/biwogatijuper.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/78169876313.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/palirog.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/68584208410.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/23fbbba6549c01c1676f423500996a8c/warenuxulorola.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/60749928374.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091112580083605.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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 10016 bytes
SHA-256: 3ae3e017a501a941e29506ef23f1e5a0e05d50d02f73136570f13603db48c068
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 17936 bytes
SHA-256: b5cef56b0a9ffb97b6993e0113907226fc9e3a3c554fe6f00e37ffdb14eecd69
font_02_sfnt_off00011d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1