Malicious PDF — malware analysis report

Static analysis result for SHA-256 9684d2b108f89d71…

MALICIOUS

PDF

72.4 KB Created: 2021-02-02 13:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3af643bf8ac791ebf341bda786ab04ba SHA-1: c22ec3da718a2bd3523427e52b1aaade28f962bc SHA-256: 9684d2b108f89d7125ddf4783ff5b682d830233da57c0094a20ce9eb5b8c3c25
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to manipulate search results or direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=video+champions+league+anthem+beli+balsem PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fcb047348c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_601305013fcff.pdfIn PDF document text
    • https://cdn.sqhk.co/jovojatubo/MhgcPge/69446450977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5fd1efb1c064e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_6015c7f0a710d.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikeraz/DgjfXVQ/star_wars_galaxy_s_edge_rides.pdfIn PDF document text
    • https://tutamakut.weebly.com/uploads/1/3/0/7/130776204/09576a5b495db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_5fe9eb1063ffa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5ffcb92150321.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5ffd61bb1213c.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ustVghO/38989222778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5fe2d81be55be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_6004be2cbf0cd.pdfIn PDF document text
    • http://loleveze.iblogger.org/10815256527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6017c69d5547d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 5496 bytes
SHA-256: 5a0cb2f5a59ec22b1214b9b1e15232b442e1dff0b17d240f4c5f710bd2e24872
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 11004 bytes
SHA-256: 0280670773f9fc467beaeee28700008e7ebd901829bea0a605ed905374f39214

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