Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6eb5c738e775f67…

MALICIOUS

PDF

69.6 KB Created: 2020-11-16 16:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f392f2ad9437f13b3f0e9ae348d9c90e SHA-1: d822077e7c1fafd0f71c1844b63ef05a825e5179 SHA-256: f6eb5c738e775f676db32087cca4b824e1598a207d2406abc03383651007ea3f
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 0.9995

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://traffnew.ru/123?utm_term=feudalism+2+addicting+games PDF link annotation
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/boluvidivekumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_5f9a23a6ea9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_5f91e9faa722d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/138ef876-2c04-4b91-bdbc-581f5b81cf89/meduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a00296-3c9c-4c75-8c80-f13293097d92/76159798705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa24251e-4869-4ba1-8675-c4a05873f39b/pobikiwuzafa.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/dyson_hair_dryer_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/what_does_r4_zoning_mean_in_redmond_oregon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4239da-9d8c-43d5-b252-c7b8f1de1eee/bezigiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006d368c-aec2-4f51-8567-577b34543de9/endless_legend_factions_guide.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_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 5252 bytes
SHA-256: 98264bf2360b98f6dcb349278a4ead83493d3440b712adc10cd008d4f74987f4
font_01_sfnt_off0000e72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 10100 bytes
SHA-256: 27c4618e58b704f5629f89de11eb9f6f302f04f1d8305cf273ef0b504b729dd6