Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcddc5dcec39ee6…

MALICIOUS

PDF

76.3 KB Created: 2021-02-16 19:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d2076420c1ce0ca50f06f6c8225fa1e SHA-1: 59bc1ceeb4a71f473c07fa8549dfe43e93986213 SHA-256: 1fcddc5dcec39ee6d8b75eeee734b7a296bd2758c13d20c53202fe5ef2efbd81
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary external URI, 'https://baarspo.ru/strik?utm_term=safety+first+3+in+1+car+seat+babies+r+us', indicates a lure related to car seats, likely to deceive users into clicking. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=safety+first+3+in+1+car+seat+babies+r+us PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404953/normal_6013a2f7b92f6.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/j8XMgfZ/87178371872.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/zatevu_nodem_ludaleregej_pogidipulod.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/LVgdhcg/84587151135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_60003f1243180.pdfIn PDF document text
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/7938015.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/6852381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_602a715a27e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_600c8c8202971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374372/normal_5fec759d4b186.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/iXg2vgi/61146418058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_5fe9aac1517dc.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Xzkmyhd/tumblr_wallpaper_for_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/cCifdgg/pocket_arcade_story_apk_full.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ffbf5ce32de1.pdfIn PDF document text
    • https://pafabori.weebly.com/uploads/1/3/5/3/135317136/3165cdd08e1e07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5fca290500c4e.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/jd5hgis/apple_tv_crackle_free_movies.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5404 bytes
SHA-256: 3b3a58292aa3ab8af5e8935b574d2c67cccd1bfbce10948f5ffc2eb0df216d45
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10896 bytes
SHA-256: c32c0f80d5b2aea66b9827470a9c324e59738ee612765d993ab6485f076a2271

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