Malicious PDF — malware analysis report

Static analysis result for SHA-256 28764d48c5c92535…

MALICIOUS

PDF

79.8 KB Created: 2021-02-21 09:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7a8ec283690b5ba0d31b2146f20bcc08 SHA-1: c8ff308d799a07b964d85977c8cc1541e8757161 SHA-256: 28764d48c5c925354a7a0752656923dd68be2cf1cf47219691ab8892a406a5f3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. The PDF contains numerous external links, suggesting an attempt to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a phishing or SEO-based malicious campaign.

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://maypoin.ru/aws?utm_term=a+thousand+splendid+suns+movie+on+netflix PDF link annotation
    • https://cdn.sqhk.co/jigitovewuk/F5hcbfp/merchant_of_venice_summary_shmoop.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/DhgPpzi/xfinity_stream_app_on_firestick_september_2020.pdfIn PDF document text
    • https://dekodisiga.weebly.com/uploads/1/3/6/0/136051758/webagapedidu_zesidut.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/jegjahe/cookie_clicker_achievements_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/LxaigaJ/89585763638.pdfIn PDF document text
    • https://cdn.sqhk.co/kopozufu/uicqEgd/94710938775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fd7dd3b13f5c.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/geihMjg/amg_gtr_pro_wallpaper_iphone.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/fokobu_polemefoka_bofitujere.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/jgp4hfh/castle_farms_concerts.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/jepedabato.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/hdgeX7N/snapchat_logo_png_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/gjeXbbk/skype_or_hangouts.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/31cbd0fe58cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_6007ee5dc8a65.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_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 5304 bytes
SHA-256: e751162810bdf5a26a6dd84c9621184576b50112a8e9f6bcb92aa6b3afb9d3d4
font_01_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 10444 bytes
SHA-256: cdea8651e1bf1a7b8a399e6d42a5a5f8a249df264980ea324a54ab431aa5c393

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