Malicious PDF — malware analysis report

Static analysis result for SHA-256 4766f1e303883e58…

MALICIOUS

PDF

65.0 KB Created: 2021-02-24 13:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 66f85caed02ef573a41ca3cff7c0ddc1 SHA-1: 57ca5a4316edf79f3b16bd2b72318464b8ff141f SHA-256: 4766f1e303883e58b0a28e0c04fefa8b3745e8bfcaff70b1007d4113e8ddc0ed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/strik?utm_term=how+to+increase+mind+power+in+hindi PDF link annotation
    • http://lofitner.buzz/treatment_guidelines_for_myasthenia_gravisrn51w.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/3328606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5fd2de1ce93c4.pdfIn PDF document text
    • http://govnososal.xyz/jalabomovakivupigobuzitekyf4t.pdfIn PDF document text
    • http://lnstagramverifycentre.com/8181910836314zsu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_6011efedb887e.pdfIn PDF document text
    • http://beststudent.fun/51051884728sgz3t.pdfIn PDF document text
    • http://nicechange.space/26521011558auy9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fdd5b7369778.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/84452960721uirnn.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/zibenoroduzuw/libro_administracion_de_empresas_constructoras_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/76875731424.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/54929392700.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/buried_2010_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/stokke_xplory_v6_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/stomatitis_aphthous_recurrent.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/american_and_british_english_words_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/48887558060.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_off0000c26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26E 5332 bytes
SHA-256: e064ec70afa0bd83b6bccc1d7cf1d5a104b9150ff7f4337302ee917a028df11b
font_01_sfnt_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 10000 bytes
SHA-256: 0819b6788b454ba58fdfed26d747dc78471314b1c098b38255740bbd1dd552a6

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