Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93be2ee8fda9615…

MALICIOUS

PDF

84.4 KB Created: 2021-02-24 04:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 108230ae5e4ffd59f2007b1c0ecb3e89 SHA-1: 83996735180391ff2fbafcc79d5c05c0459ecf58 SHA-256: f93be2ee8fda961583f3e0d84db0f61ea0fba3169d2d240bbfbef452cc8bca73
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, with the primary URL suggesting a lure for a financial algebra workbook answer key. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to redirect users to malicious sites.

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://jottigo.ru/strik?utm_term=financial+algebra+workbook+answer+key+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476925/normal_5fca7d8631cef.pdfIn PDF document text
    • http://sun-italy.space/nemevobifotipabagadoper0vkrr.pdfIn PDF document text
    • http://usesucre.pro/kaketipalitagatuzoregulupidx5k.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/1059037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fe60f9fe3da1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5fc6dbe53eb0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424662/normal_5fc7105f17c87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5ffaccd4304c7.pdfIn PDF document text
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/gerubewaf.pdfIn PDF document text
    • http://starkrobotics.org/444936358913ppi0.pdfIn PDF document text
    • http://italiahot.space/617164108417xnuy.pdfIn PDF document text
    • https://sepoxoritafide.weebly.com/uploads/1/3/1/4/131438330/bered-bakagose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_600a2808409a0.pdfIn PDF document text
    • https://femezusuf.weebly.com/uploads/1/3/1/6/131606597/a147d1936cd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fe2af2eb3f7b.pdfIn PDF document text
    • http://deflecfcvy.best/meters_to_feet_conversion_calculator_free7p9tk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5fccb3342c82c.pdfIn PDF document text
    • http://shopsmmv.site/anatomy_and_physiology_crossword_puzgt8vb.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/210777562575zetk.pdfIn PDF document text
    • https://rixagaxovexi.weebly.com/uploads/1/3/4/0/134000332/493de39.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 3116 bytes
SHA-256: f704c1404df0b148e80e0ad62ad6f2c319933a7f510adffc10b703bd866490dc
font_01_sfnt_off00010bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBD 5676 bytes
SHA-256: 380830c4ecc9c491af3d28f78df99cbb124600515e802f9fc11fa30452744de8
font_02_sfnt_off00011f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F30 10760 bytes
SHA-256: 79fd41f2eb4e5d9862a8c74347b89e6f159edc4f7d3a9d1fefbfddc9713634d7

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