Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7b272e4e9806bf…

MALICIOUS

PDF

77.7 KB Created: 2021-02-15 16:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d8f0445c242ae4447d19606e6f269dd SHA-1: 3b745580e533a6332c256e6f45e8f7309a720f35 SHA-256: aa7b272e4e9806bf60b6528aa9fac613493ec5b565b34f94b2f301bc57df5205
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. This suggests the document's primary purpose is to redirect users to a network of websites, potentially for SEO manipulation or to serve as a distribution point for further malicious content. The presence of multiple unknown URLs and a high ML score further support its malicious classification.

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/123?utm_term=celtic+warrior+girl+names PDF link annotation
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/zorozoloxox.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/apMgihe/61327221422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_60183e226ef31.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/cY8ijfh/how_to_read_tarot_cards_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdaeff54452d.pdfIn PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/EgehbyV/8278462888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_60001607b9163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454302/normal_6015e8314255f.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/fWOYGLA/vadeba.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/f88cacb97ab8520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_6008b1a15708a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407733/normal_6003384625079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_6019f14c0b889.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/pesetufavo/congratulations_on_your_promotion_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/livro_temperamentos_transformados_baixar.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_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 5116 bytes
SHA-256: c0cea9d0f4f0bf16f63ff33735b59436151d4fe6d9bb5888669d1e15416bd4d6
font_01_sfnt_off00010433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 11184 bytes
SHA-256: d6c564a6110b21a63c7f92787aa3ac1b29e7877913705702bc16a45cc5deba28

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