Malicious PDF — malware analysis report

Static analysis result for SHA-256 2409568e9131e880…

MALICIOUS

PDF

86.4 KB Created: 2021-08-01 14:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a743025f681d0d3444d6b0f903ce7110 SHA-1: 48969c0d5f1251b4b69e42fd89b123da0ca6cccf SHA-256: 2409568e9131e8804a1bebd3da1a4bd2c10eabc0889526df23faf68309134465
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farm characteristics indicates a likely spearphishing attachment used to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • 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://alexandraharris.com/clients/36054/File/80281073388.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0692d2bfe---65279102150.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607918904a5ea---56471233323.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/75479472389.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/nojor.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/8a9f2f53a8501a00858b2ddf1395d0e5/38282266010.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/cmjgfkrm0cpt8e6k18m3itprm3/kogilutovadu.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78ad7d8508---mexotolexedotuwu.pdfIn PDF document text
    • https://esz.jp/img/editor/files/95343136304.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/236713324.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a717ff44c47---19053999850.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ae42701b9517a0fa4bc32e25b4885a40/damefepi.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/42560344031.pdfIn PDF document text
    • https://loctra.net/userfiles/file/96213782561.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/86063528478.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e4edf65ccf3df5f9a5561fb011763c1/woxupebuv.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/barenodijidazodikutisa.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160acc149451c5---79902400908.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6d566101---90508832160.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/20028964378.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16102ce1325b27---dakopafiwaxaruwurilitowud.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6c815259a2d2e4657bf76efd8fab5d75/63560788778.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/pusagafejazuwemaniwive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gastritis+diet+plan+in+hindiPDF 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_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 16372 bytes
SHA-256: e535a81ed5586e5a48f4c92c17c68e9a85984f61a9159ffc7b75b4b38ab1ed0f
font_01_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 10408 bytes
SHA-256: 6fe32aaba921abc5a5debc48e864fdf753faf787b34a582a215f6eab116b8192
font_02_sfnt_off000132c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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