Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbce95be8ca1ea1…

MALICIOUS

PDF

71.8 KB Created: 2020-12-27 02:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a1f5048e04f3d9b8df25c92637075ce2 SHA-1: 9df984d22f80ff8a7d4b09bc094877342fad2922 SHA-256: 2fbce95be8ca1ea14555412a2cdd66c7bebe9a116859e1f1667606b845411a64
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 0.9997

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://traffking.ru/strik?utm_term=art+cupcake+topper+ideas PDF link annotation
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/luxin.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/23c603c.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/gebukil/rebulidaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/53863693469.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/dual_whatsapp_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/bloons_td_5_mod_apk_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9496264-f6e5-460b-8e08-d6e8c5521c5f/alley_s_pizza_nevada_iowa_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/90769817572.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/sign_up_page_template_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d2a026-cb2b-47e2-9169-33985e00bf8e/67536387871.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/oracle_virtualbox_for_ubuntu_18._04.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_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 5088 bytes
SHA-256: 9085bd717199038cb5ac8da92e07a8d333b5867cadf85f64683cc537be106a41
font_01_sfnt_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 10420 bytes
SHA-256: 86143d4d63a2563f547da02aadf3f27374bd5771ae4a3421fa88d98a3badd381

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