Malicious PDF — malware analysis report

Static analysis result for SHA-256 2193193a623872d8…

MALICIOUS

PDF

74.3 KB Created: 2021-09-20 22:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3dd845f2091d678cb975abfa082694e3 SHA-1: 68f75b71c521ab2fd175dd2c0affc0b78c7e5bd4 SHA-256: 2193193a623872d81cf4be407e5b95e8411245b2dda4706439e67e0c2a7024ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of 'utm_term=cmm+launcher+2020' in one URL suggests a potential campaign or tracking mechanism. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=cmm+launcher+2020 PDF link annotation
    • https://mobile-translator.eu/app/webroot/media/files/52015383454.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/69691166246.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/pvevrun35fg1do4uo87vvabp35/92820358225.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/68135314690.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/tanavusuwezixuremifow.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/nufuvirefes.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d18e1672372cbc80c708f1926be9d902/71750377937.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/zepenekoxar.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130c35f75be8---922143723.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-19/20210919130638843275.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/zowiredotez.pdfIn PDF document text
    • https://izometal.net/mm/file/19503547806.pdfIn PDF document text
    • http://fgosvo.ru/files/files/34697317740.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/senomazobitevojub.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/34129338298.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bokavitaniz.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613f801d7195c---73635725078.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/n1207ot5j7pg75i0dbbmaha745/zotugalixadetarerifunafis.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/vigalo.pdfIn PDF document text
    • http://konberdbio.com/upload/files/84134092296.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/ziropowuwifezejanixe.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/womamefemisixof.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/t9sbo7fb9bukstbp0t736uvfqm/79608941585.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/88953006813.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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 10392 bytes
SHA-256: a65ac520265d6722d39646db2af5cae43b202cfd8fb2e0f104e33339e7be620e