Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60b380c592a82b7…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 07:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7feebdc57e24a8e5c3815356db48c455 SHA-1: 1e04b35e21f2f2199245a129d97d3b0471f9bd3a SHA-256: f60b380c592a82b7692b9ea253414bcec4bce5f11a5cca685f9f83099080ec26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/2dv16ffgmcb2jkeos5010hcpcm/71026239924.pdf In PDF document text
    • https://ceccarbotosani.ro/userfiles/file/duxafikodokasigojera.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/91103587190.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/varasijosi.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/f274d24a64bf9d64900fa9ddd2d453d5/reted.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210713_02EF07A8D7868839.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/xeselatozo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69f5bbf89b---sutodefiwexile.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c3f50eea---98035525270.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/22823915343.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c630f911211---8463005906.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/6b35a5e6c812ae405458e3a4d47b0b03/76024853159.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099606d9077d---8671353482.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/72334886338.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/979701414.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd69b843cf---9678193632.pdfIn PDF document text
    • https://menu2uplus.com/images/file/pakezogifupelazifog.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/lezanebujij.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a60580c458d---92457551746.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/30586086934.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/boxigomeve.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/sizubebumebedavopuwosul.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748a0587ee7---vuwijukotululotexuw.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/24693493573.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/wisiwesige.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/81454380019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=new+baby+list+pdfPDF 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_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 10484 bytes
SHA-256: d04f5ff8a14691c5393b09b2f07f743ad92b35a42ef9a75e5994897bc11a0fe1
font_02_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 17004 bytes
SHA-256: 8eb341e2d4556596596516821b3cf0625f7f9709524fe4d7834aecbf5f67aa39

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