Malicious PDF — malware analysis report

Static analysis result for SHA-256 75edec3f4f1c9ab8…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 12:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 720fdfc97c5d4f2e93624bacd2bf6864 SHA-1: 4e92a2a4eedb212541c6a8b41aa4bbcefd5b4fd0 SHA-256: 75edec3f4f1c9ab890fd6ab3ae7ddd24994aabefa2dc61eb949a3cd893d940eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are identified as disposable hosting or compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns suggest a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 http://www.gonouvellezelande.com/files/ninedufi.pdf In PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef7be359be---tulupi.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/33752457562.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210911192605.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/71158562466.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/98608045050.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/9176a2c7f32624bee18bba474f1fb71d/jopugalanazaropefagizok.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/wovedilonod.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/78259530285.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/6389265529.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/totedevazegegejegofudel.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/jedagorawutewijupofu.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/1843122903.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/zolalegovipinonogulux.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/fb7aef958c2e6d5a16aa9fbea52e9c6b/furaxewo.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/70010940868.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/09/mizanewezejop.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/babitilidefedalod.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/270090191.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/zurabugugewuxupodeka.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/pimumoniposu.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/pikolizujegi.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/41600832658.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/dubuladojok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=install+non+play+store+appsPDF link annotation
    • 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_off0000b23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23D 15212 bytes
SHA-256: d7f62b4758f5ba812e74a0291caeea50121689d291ed1aebf05d4bc7f7ae1007
font_01_sfnt_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 10216 bytes
SHA-256: 062af904289c0b127874dd6db9da5a1fde83ee52fb1f386f177312be720c563a