Malicious PDF — malware analysis report

Static analysis result for SHA-256 159bc0c779801b27…

MALICIOUS

PDF

72.2 KB Created: 2021-02-12 09:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2ee39d1f15b07b16e71323e0e1356f12 SHA-1: 0764d22a90f67372e449ceae010b7947bc00aa72 SHA-256: 159bc0c779801b275259c5c7fc4be6add06c28c71e86ed9f071c55d9feefc3c5
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wb?keyword=blockman%20go%20bedwars In PDF document text
    • http://extraterrestrials.space/classroom_language_exercisespge3.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/khihjif/datijezexiwakadizazusa.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/iejezF3/ziwekimabuvurivudit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_60044d7db7fd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ff5a38fb5340.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/dUhalYH/mobile_phones_on_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/hNhjgjP/wordbrain_2_word_baron_vegetables_answers.pdfIn PDF document text
    • http://icub.tech/bolakekikixogezatifosefu7jlyu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5fce68d39dbc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_60005080cceb4.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/NibJgg8/amazing_jungle_world_2d_games.pdfIn PDF document text
    • http://spain50off.info/arrl_handbook_2020_free_downloaduul5a.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/iaEhgYS/91012777950.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/supefujoxopubu/72881700194.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/43996601886.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_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 5604 bytes
SHA-256: 28797bac90dc0fea2f9950e57a4a6564707ad85cb3f23d3a21b8bd0e0457237e
font_01_sfnt_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10024 bytes
SHA-256: d251abe02000269439291da6dc08d030fa1587e48bbf1c2dcaac1c73b3eeda86