Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0d49df5e44533e…

MALICIOUS

PDF

82.2 KB Created: 2021-08-15 00:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9dc45b64735a8162fde7b23a47e86422 SHA-1: 6a69c63f790f82e699dbeeb88ab4fc15dfc1bb90 SHA-256: 2b0d49df5e44533ebb35e22e8e75985fe8415c23702880def624991aa78bcac7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=is+element+3d+free PDF link annotation
    • http://barahi.com/assets/userfiles/files/vagasanigubus.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/88546277548.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/477225c313bbe27a31b472b631ac67ed.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/zigerogeto.pdfIn PDF document text
    • http://pronobile.de/catalog/file/50544276709.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5e8aca4a1770fafbc91c37c43ce035a8/3677836237.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/nalubudedubefutogogateli.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/gupuxitukawokek.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/48854125033.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9082e5e90---fagavorinaduwobojevaw.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/p0v4rtvjg9p8256q7kf68mdn96/rerelanalexanidobika.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafc319a3c---94366882105.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/51980549495.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/24275345212.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/18ab219d426775dd19d5a7013fdc87ad/dabapuzemugogimepav.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3il57u5bjjruse2urm4c44vv33/tekepusuxejugaj.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/59808112932.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/40544155396.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763e1ea9614---ginuzemujazakat.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/namozeripotofu.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/66091831088.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/jarokadewemelero.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c13495bf86---45158728943.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 17080 bytes
SHA-256: e76755b7dd6cfeec9a5e865094f2f64081e7a368541a43ad539635dbe918e35d
font_01_sfnt_off00010ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 10264 bytes
SHA-256: 2fa6e2c3c77b58891e33826b4a4e8a7415675be4376b49b4f56bf945b337f3bc
font_02_sfnt_off000123bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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