Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef7795318593e07…

MALICIOUS

PDF

76.8 KB Created: 2021-02-18 16:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e67b3d66b5e2008f4de1d2b2fc4d346 SHA-1: 12568aebcc1bbda5470b8414b3f0eb446fbf8586 SHA-256: aef7795318593e07d4e4deaf6d4d0176f6bd17437079c2a30aec4ef3343b3952
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=what+does+a+school+manager+do PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455405/normal_5ff65037d612e.pdfIn PDF document text
    • http://nout-sale.site/tamazisaparadarete2u5h5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422645/normal_6005218e3a125.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/aroma_8-cup_rice_cooker_and_food_steamer_manual1wkyz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5fe78333b0660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fc8128d02d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_601207c247ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485591/normal_6012a01acf524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_601624b6d923f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd6476a2c780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_60262aa79e45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_601080fe0eea3.pdfIn PDF document text
    • http://lunesygets.xyz/tokojemusekafebosxk11u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384160/normal_6006a286653cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601f5306ce54f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fipijife/43919498156.pdfIn PDF document text
    • http://nipovowegase.rf.gd/how_to_buy_stocks_pre_market_robinhood.pdfIn PDF document text
    • http://gewekerob.epizy.com/nimafufiletaxuje.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/ebay_app_not_working_on_android_2017.pdfIn PDF document text
    • http://jatuxijor.epizy.com/50735669332.pdfIn PDF document text
    • http://tuwafexom.epizy.com/calendrier_vacances_scolaires_2018_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/protection_paladin_leveling_guide_classic.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5364 bytes
SHA-256: 1ec57dbd7a230010d7089ff68b7289daaee404479fa4735af5e21fc8fe1a5d1e
font_01_sfnt_off000101aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 10564 bytes
SHA-256: c2c09b6c691e2aa269a311f8b03a7a3c23fa300e9ce33d913e72fbd4beb4b4e3

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