Malicious PDF — malware analysis report

Static analysis result for SHA-256 d297d49a98a206db…

MALICIOUS

PDF

76.9 KB Created: 2021-09-01 02:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6dea5b4115eb5b977fe56877577f99cb SHA-1: 6fe4d593ca5395250c1b2bd357273a99e2f68b39 SHA-256: d297d49a98a206db821cca70881e12d36b6bf77b4bad1d7bf84740edc7a8ab8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to redirect the user to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=speedy+current+affairs+monthly+pdf PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/m0ngfqgoh9pu289kapeonff86i/nesixebarevulivonebi.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2c5c1238---66397970813.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a2b7ea3ef---86169855884.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f410785416---mododaraf.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/6925915070.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/difikiwolilu.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/83372103100.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/fobamajezobazutuwom.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e7ae6a266451959ef188feba5f8818ec/92519664547.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/gakuzop.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/kafobivokejalenozaxikas.pdfIn PDF document text
    • https://kham.vn/userfiles/file/48406703999.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/gopalonofezedubitisadela.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/88n86fdntosbsq9kfdsvl4r26d/60209933119.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e10842361e2b70c7434c8b2d1a5c0380/96242792541.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/duvibed.pdfIn PDF document text
    • http://prograsifkalip.com/files/85935437666.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/fuvuwisifurumirofazudoli.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/54a019d8df22bbdc5329cf8a2105bc2c/joboku.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/zuwipijomupukavel.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/wewewarapawomo.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB203 11176 bytes
SHA-256: 7561ca1463325d48f3307b4b814af471f28c310094c4e640a9f329344cefad34
font_01_sfnt_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 17652 bytes
SHA-256: 6dd22f3ddc47702b4988b91c0f4aaeceee4a51858d1ee921aaee88f3bf34d3a2
font_03_sfnt_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426

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