Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca5415b0e82beb2…

MALICIOUS

PDF

93.5 KB Created: 2021-07-25 16:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b05f6d283686e7f1161396b1a696bf06 SHA-1: f9fd3751e85322a0150a0ca596bf2ee5bfd2a781 SHA-256: 0ca5415b0e82beb2ef43d6650bb2f36e9a6907833527d52cc71cfb0dda58a877
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://shidoremicrosys.com/media/92348454572.pdf In PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/wasukuxizizaluxelavid.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/459291a0c361abbc95dc335156fba0e8/xudurepetawofiranigaj.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/lefatigivadumov.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2tp35pon2f2vjrcu1rfetp4mv1/mitipowaleniwisusubekos.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f9c4f2bf4e144ee89d3664f5eb1d7271/neliwewulozanonivugaveget.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cb15949045c---2257913728.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gp1d3er676fsrrpgp0s9a10vo1/20957540921.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/15366963681.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fb3b22392ba0e05ebada15c9dfcfdf07/27417670507.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/venimagoxemupisapa.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/rulepikipifelasigetivumo.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b14dac1d2---lowuvufaresaboxemuwuwul.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8e9441e17025a7a4be28db6a1a50d1bd/sifojanupokobifajoxi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aeecbace8b---dufamuliroxozixubego.pdfIn PDF document text
    • https://latework.cz/soubory/duriresipogawilowebopate.pdfIn PDF document text
    • https://olterus.org/contents//files/zasite.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/xozaka.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c6c74c84ae01cf1b09b19c575e3dbd69/jalavepaxavigewosulen.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/14058284190.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/t7a9pkgkti5o0hh9o1iu0abn15/88267517795.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/65686624065.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c6c8cbe92---66744834395.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=descargar+utorrent+gratis+para+pc+windows+8.1PDF 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_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 18576 bytes
SHA-256: feb6a23c03be695fc18ebb17319bbd2b847ba9950270b4b7d98d52f93b4a8398
font_02_sfnt_off00014b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5D 11156 bytes
SHA-256: 0e8f4fd3ca0d9eae009814b306c43de0c46815428c55000d54b660eae2f00501

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