Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5814160c3364eb0…

MALICIOUS

PDF

73.5 KB Created: 2021-09-24 08:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 947e6365bd0ad3cb614b1bd99db008d1 SHA-1: 0da541da2d5797612a0ccfb99f26d7d13f67a3f6 SHA-256: e5814160c3364eb04eb2297f66210a1c9647074c208eee0e912bee5657bf686f
144 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV heuristic identifies it as a phishing trojan, and the presence of multiple external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the document structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=how+to+cast+from+my+phone+to+firestick PDF link annotation
    • http://srmtteaparty.com/uploads/files/202109052148228587.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/vezov.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/fipasorefobuzola.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/fanogu.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/wifowiremerusopuzeponevak.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/sijorejavokukoxezizebex.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613de6394c839---20453933956.pdfIn PDF document text
    • http://surtek.biz/image/files/20150408_131141.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/98662074225.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/tinovifevuvavulev.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/kawodususupa.pdfIn PDF document text
    • http://abwessex.com/uploads/files/33009286566.pdfIn PDF document text
    • http://antracit.topmebli.com/content/xuploadimages/file/siwemarezogukufetimozodo.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/wopunoketusasijemetoni.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134085282433---84303402020.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/fesurufonawikowivesulak.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/39366038188.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/47265097795.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c82bd72213cdbd4d76e73a92ca6bea8e/gasutiwajarobegiruz.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210916162034.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/vizedujitobuni.pdfPDF link annotation
    • http://thsport.dk/ckfinder/userfiles/files/55127030857.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/61cb33077d1a90d138e06b3bd6af8be9/muxubajakatejolesarapo.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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 10980 bytes
SHA-256: 5db07fe58e80c6b86f94d99c728f31b142f3ec133c744bd5b88dc37529f11f9d
font_01_sfnt_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1