Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de966720f0e51d0…

MALICIOUS

PDF

78.2 KB Created: 2021-06-10 19:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 35b31711b1f9dfb847acf54e3693b385 SHA-1: b2471216f9d2415c49276bd692a98129812ef3da SHA-256: 0de966720f0e51d0f3c87f6a72b3fec9a7f0a93cb10de466c5ab84e5ba745b36
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to various compromised WordPress sites. The document's content, disguised as a guide for setting up Google Stadia, is a lure to encourage clicks on these malicious URLs. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://medvor.ru/uplcv?utm_term=how+to+set+up+stadia+on+tv PDF link annotation
    • http://acecaalcoy.com/userfiles/file/22897948373.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/dv4e8sfjucs7l48ovhokbjdtq0/xenefukixixixijuguwen.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3303ab7f1a---gexafakimapadosifikiva.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/didojilupakakokowejixa.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/p443pbgvvkgu2fvcj0egaqf0tr/keneduja.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a70cc6382d53c2c0c7cf01cef4d31030/32024439090.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/81a42118b29b896af4313e0849c51d47/62733756422.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/871baaa1731e248f20d912c57373589b/50055326783.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/toxubewes.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a089c4a7db2---tegog.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/9891f3f34cf46f01de05a26a4d12c203/67061789307.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/4cb2321e8fc330f44b5f14f3c51cac63/20217322197.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/uchmv69h8i1c360r58qua32mv2/58096101544.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lpau0048igjroa5dblh4atmrhp/wudigilelosixodiden.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/qsfjoshdm93lah9fu4in13l08c/40269488759.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/65918cd12b07d4355c1a97d2d64a324e/50824028679.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/36711041644.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/95965653024.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/pj24219dkdofp8sq5vgujs9ka3/delukefutekoge.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 4940 bytes
SHA-256: 01f3d150c480cdedda657214e1a22d99e2e291d77e5cee8167e17bfcc410c1b6
font_01_sfnt_off0001050a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050A 11552 bytes
SHA-256: a0921d012d0b951094bd960b27075f4bbd9c723feaf69d063162a692bef109da

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