Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae84eeb1e2bb19f…

MALICIOUS

PDF

73.9 KB Created: 2021-09-26 14:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8aafe7b490827546df20d37ccd1224c0 SHA-1: 67a78f033d5be45cb27fc2aa7f324733a5d33c71 SHA-256: cae84eeb1e2bb19f89b7d719c81392a12fa350da38eacd305c21aa49134e6db7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/uplcv?utm_term=outside+the+wire+online+stream PDF link annotation
    • http://sozopolihills.com/userfiles/file/78138265534.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/95877432240.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/22171219351.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/navabofexujuzaj.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/72829241089.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/72001216899.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/bdc345bf758cc1ae06e9e1fe947bfbe3/vebazupopegaxexaluzut.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4d320830a34e06f2c3f516d6d712d48c/83322824225.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/90381459006.pdfIn PDF document text
    • http://autovoda.ru/upload/files/wifufenogemisusimeseje.pdfIn PDF document text
    • https://niceppl.com/images/file/savugunuputuveve.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161404254d7fa5---jemitiwofuvofojuwitusib.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/59156485849.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/wujatenew.pdfIn PDF document text
    • http://royalgroup.at/tmp/wakemuposikibazazuwaro.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/10154858091.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/16988172146.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210904_052432.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/rotovipav.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/60514295262.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/gazagubarus.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/xirotelixulidix.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/6676532306.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 18956 bytes
SHA-256: dfff22e2aa98c01cf8493d9162365b97e22d156395e5790ecbc00851b6fd3cc7
font_01_sfnt_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 10724 bytes
SHA-256: dfc0c7f4fadd90bb8bd95c6db78a0f691cf60651a64f0adfff086f0deb8f2fa8
font_02_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1