Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88ea2392a8df99a…

MALICIOUS

PDF

82.2 KB Created: 2021-02-21 15:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 15a84f44dac753da5296b079c64bd74e SHA-1: 12327e4773f5ec14c0afd643c4413181a0560ca6 SHA-256: c88ea2392a8df99a17deee28aaca7d9e100d35c9a8f91c6c2c7d8f246a4d54b6
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on link farm services like Weebly and CDN domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host malicious content. The presence of an embedded URL and the ClamAV detection further support its malicious nature, suggesting it's designed to redirect users to potentially harmful sites.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=horton+hears+a+who+mayor%2527s+wife PDF link annotation
    • https://vokevifiv.weebly.com/uploads/1/3/4/6/134657891/3930618.pdfIn PDF document text
    • https://sexevegafuxa.weebly.com/uploads/1/3/6/0/136083832/nejer.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/4jghJie/43325177977.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/gdePghk/finger_guns_gif_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/jj4ifMt/reapers_revenge_tickets_groupon.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekajebema/ahdEFIa/pokemon_cafe_mix_level_100.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/g9jc5gf/word_blitz_online_spielen.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/3ji9nie/disneyland_park_paris_hotel.pdfIn PDF document text
    • https://fodigedij.weebly.com/uploads/1/3/2/7/132740281/rameburejud-zolosolipirares-rejubev-zolafedidafev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fefe6b16d0e1.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwevini/ePN1hhb/64317748185.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/2pnWjLw/word_for_a_master_plan.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/febopa/90096268259.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/45657783267.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/nubeli.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/94569891061.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_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 5164 bytes
SHA-256: 5423ad0823d14b1b74a8b0a4ef5ea8396c787b14decabfde34562cab784feb07
font_01_sfnt_off00011453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 11600 bytes
SHA-256: 56cc5a92025280b909183417f03ddd65c7c13fcd8d9230c3c015a6d12665b1ec

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