Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9a3d1bf2723ea0…

MALICIOUS

PDF

76.4 KB Created: 2021-03-29 20:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ca77c408f42373e9398fe157057903e0 SHA-1: b248441246b9126ef1f8eeea501c50ec94695f70 SHA-256: db9a3d1bf2723ea0083c7e30b42dc2954a2082c25c974e8f5205a55d19c4e647
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://lozipotod.ru/award?keyword=free+cinematography+books+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386595/normal_60523df36e068.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/677517.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/ahUsRU5/44325147644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_601dcdf2ef762.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/1420ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/bharMhd/69377551601.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/jjKiigc/woxagewusozufi.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/desekusoxi/1250780046.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/viweborefixikedegokusuwav.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_1689015f4d864c0a91bd165384dd85ba.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_011bfe98312c4f9c83eebcae7ca20b25.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_f4b5489e4ab7422c98d6b245e9fabb2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopeteb/55587179753.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/gaming_logo_template_no_text.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/lowuvawimarodepevabarir.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/somenasamobusedef.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_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 5796 bytes
SHA-256: eaf13d34f4f1618040c1136661b0de87bfd1d60d49cac401106ac80ddc95c27e
font_01_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 11432 bytes
SHA-256: 9056fb44051d7e4cafb177946e1e5a4d6c126b61d7bee0cd87c98d8ef0f7a504

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