Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59dd5d47962235b…

MALICIOUS

PDF

79.8 KB Created: 2021-06-13 05:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 88b77e7a95c682032b4d48a50ae1e17e SHA-1: e0ae2db03f8cadea8e96043c2245ef76b0d6d091 SHA-256: e59dd5d47962235b4d10293e83b328e5550f72b55eefec595042949b5c4167a7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. The document employs a social engineering lure, instructing the user to install a browser extension or update, a common tactic for credential theft or malware delivery. Multiple URLs were extracted, many pointing to compromised WordPress sites, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://irlanc.ru/uplcv?utm_term=android+10+dark+mode+apps PDF link annotation
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e55d20f50---77558885329.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/kpcngr88dbcl4m80dpd7a62fe5/sifasaxovogonabixuwug.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c31d1cec1d---lenarakozetobubitef.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/93738833381.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7c2cb77922634419d110b0faf007f0dc/momapep.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607396209dbca---pobozokikojuxus.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b305daa6af4---boferobozol.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/besolezikawipoj.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/1f8d16bcfb92cf8ff2fbd13587784cf9/53458607177.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/crc1vur1e745o4vvnn4kffub17/48009637975.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/44288936039.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/3a583191c24ad0c1274e09fd6ff52ad7/163945547.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/xofokerapakoki.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/lekumofojox.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f1a255c5d---gujanokafemimoku.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/mofotepi.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/hgrdvogqn76skrr5s5mqvs984a/44206634829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 5320 bytes
SHA-256: 85e322af12872a6a85bb79af484d0bf282192473a97046e530df3d7a73accc80
font_01_sfnt_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 1760 bytes
SHA-256: 2e2a0ac1cbf0755e91d864e0aef9463b15969a5a6605aac7b35e26c7bf7f58e2
font_02_sfnt_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 11212 bytes
SHA-256: 108acbe5fbe101a84686f1d2e53d8b732af8c2ac87ab2d47556d9bf504202594

Open this report in the interactive analyzer, or submit your own file for analysis.