Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfccaeb4afdb256…

MALICIOUS

PDF

73.0 KB Created: 2021-02-23 08:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c769a8b9b49a16870b6de915beeac18 SHA-1: cc42b85099152aeaf296e7d14b0041c1d3646e6c SHA-256: 4dfccaeb4afdb2565c373aa36eb90dbfc7518dfff1284509563ebd82b809a13f
246 Risk Score

Malware Insights

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

This PDF document impersonates Microsoft, using a lure related to Xbox Live enforcement actions to trick users into clicking a link. The linked URL leads to a credential phishing page hosted on disposable Weebly domains, indicating a phishing campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/2930668.pdf.
  • 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://bologen.ru/wix?keyword=notice+of+xbox+live+enforcement+action+how+long PDF link annotation
    • https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/2930668.pdfIn PDF document text
    • https://xidozuju.weebly.com/uploads/1/3/4/5/134597445/rogekegewinok.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/bivaveveresagu.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/f15437439.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/3159068.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/250425.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/fojufumebo-giterudof-fosejedisa-lipiwojijugizi.pdfIn PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/f57de.pdfIn PDF document text
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/betimufafebite.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/4523aa7a3d8.pdfIn PDF document text
    • https://gimazujik.weebly.com/uploads/1/3/4/2/134235519/vakaw.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/7514139.pdfIn PDF document text
    • http://storeeuro.info/is_riba_haram_islam_qauqzex.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/pagagosi_xobesome.pdfIn PDF document text
    • https://wusoxebuwewete.weebly.com/uploads/1/3/4/4/134432123/putujepowosino.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/4645917.pdfIn PDF document text
    • https://luxisawevevolal.weebly.com/uploads/1/3/2/6/132682936/47e74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 5236 bytes
SHA-256: 1ffa532b0e8f505068c4f11900fb49b40ba0da9b634b97d57d37735e3272a5e3
font_01_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10212 bytes
SHA-256: f68530024e154eb6e29476878098d220d256c19bb3bc52cb94ee2f5c9af5b3a2
font_02_sfnt_off000108d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2