Malicious PDF — malware analysis report

Static analysis result for SHA-256 380715f4db40b141…

MALICIOUS

PDF

80.8 KB Created: 2021-09-04 05:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2865971999b1cce426d4598de625704e SHA-1: cf3a00544b6f5528adfeebafdcee42f40cd3df8f SHA-256: 380715f4db40b141f5be1bd916285dfc93fd5424d4a7bbf848e649cef57b33fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to various compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • 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 http://ohana1bbq.com/uploads/files/vasivegezewamitaseromivo.pdf In PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50ade820aa---33480796567.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ae37564f5---36513636101.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2aab3a01e---moligigina.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/88624031045.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/pipigosivazoxo.pdfIn PDF document text
    • http://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/mugigomezawesududubaj.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/b4c8032b55bff92ade301fcb45476e69/lasuxowixavow.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88932477734.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/rexelakebez.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/baratazokerome.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/xujasakonituduxuxageweta.pdfIn PDF document text
    • http://jainfarms.com/uploads/lopugutife.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/82784895030.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c127922198---61560431747.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/betepebujemegamililajisuj.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210702205529.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/mcgqlvj1stqi3sthgif7l9h4b9/nonimubaroxogizataxodike.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/69631349898.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/18072790297.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/5104648c67ba66adaf25668fc4610c17/woravolelofitarif.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/67240755003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=reinforced+concrete+design+book+by+krishna+raju+pdfPDF link annotation
    • https://lapdonline.org/file/66025924603.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_off0000d676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD676 11476 bytes
SHA-256: b38fd0e5fd18187849beddd9be0dd96e91e529c102c47295b8c2178d8447d53f
font_01_sfnt_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 17128 bytes
SHA-256: cfd57aadc23bc4ff0806fb4a51ccfbe8f7edf8dc2e2788d576b986b52b9dea04
font_02_sfnt_off00011d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1