Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdf7a8036deef5a…

MALICIOUS

PDF

74.9 KB Created: 2021-05-28 08:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79afe41bc0c77a4c84a4a582aacd2c09 SHA-1: a6f2c1f9dd9be9e64330afe8d548ca70d013f326 SHA-256: 6fdf7a8036deef5a24e6d7f72b677a964c4f6a6c2c21cb4e64fe49962c9acd1b
96 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier. It contains a link farm with numerous external URLs, many hosted on compromised CMS uploads, suggesting an attempt to distribute or redirect to malicious content. The document body, though heavily obfuscated, contains references to 'Viooz movies online bollywood', indicating a lure to attract user interest.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/dbo0c0gs55dpc8va8140vbar8g/titosal.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609af7bcb44e1---mifovunafuriseju.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/abkv5cht2qi892e34e33877pot/72917607729.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/23657163167.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/974c389f77ce719fa74fd0dc5c3b5c13/tapivafitilavesipavidu.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/semadevazev.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93e14dcc31---12810671579.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ag9k14e2lq6m7bjdpl2145kr2u/jiworobotopeve.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6fddf0327---fojepokuk.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/34520715085.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/38722897528.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160793c4f61842---xivojamoza.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5540061affcee7938431b4b36b2e187c/21540473451.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/27955332911.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdf808507b---rigifegunelo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/l3d232r44vt4gjavmvgip7nfgs/notalizavubaro.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/mcnk58turkv6h8mm023nv01ea3/nifemutekora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=viooz+movies+online+bollywoodPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 5072 bytes
SHA-256: 91269004bbc38b60e724293d9fd3df66ee7f13415d29fe923e95712b58387cdf
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 10624 bytes
SHA-256: 7cbc4e35ff6b3be1c38e0539a94a677a32f3bba62529d2c23eed95eb1b691b8c