Malicious PDF — malware analysis report

Static analysis result for SHA-256 3622861512c77443…

MALICIOUS

PDF

75.7 KB Created: 2020-11-23 14:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 98521887a755999af3f735b0278ac9bd SHA-1: 9db2ad92d9ddef2e003376a18bbf2d218d47ca7b SHA-256: 3622861512c77443017648f857c988575bc5447fc24fae9b983f1962994045d0
156 Risk Score

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://traffking.ru/strik?utm_term=pinball+restoration+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f95a08102d21.pdfIn PDF document text
    • https://gozozogedabasiw.weebly.com/uploads/1/3/4/3/134321967/movugilasirum-gevopifivebi.pdfIn PDF document text
    • https://mebudowafiwene.weebly.com/uploads/1/3/4/6/134629245/418869c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_5fb848045a704.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/pinekida-garuzodimewofes-sutugin.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/wifozuxeku/83417018630.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/luzagubekiwanefozepodo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xojosanelonupolisobugeri.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/21175372712.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/artsacoustic_reverb_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/3d_biomechanical_analysis.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_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 5132 bytes
SHA-256: bc12c802cb007fa98866278dada05e5d45b35eb740d2cdd6ab1255fac10a6668
font_01_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 10368 bytes
SHA-256: ec8924de80ea11501f9805d7b34fec39ba045bed2c7b70b8087c35c9a075c69a