Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f999b63ae305b07…

MALICIOUS

PDF

71.1 KB Created: 2021-02-26 23:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b38305a7fe98e937e5e58abb22aba033 SHA-1: f0d1f938526ba5c46dd871bf7caf307f828887c4 SHA-256: 3f999b63ae305b074c4d9fed52036c01f9c205154587a9835f0b6f5efac7408a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://kuzutuzo.ru/award?keyword=why+is+my+internet+broadband+light+flashing+red PDF link annotation
    • https://cdn.sqhk.co/vamunidibu/idpUE2A/opera_scores_result_football.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/7813318.pdfIn PDF document text
    • http://techanomic.com/74485037810gaw2k.pdfIn PDF document text
    • http://teenagetutor.online/73620149585623yx.pdfIn PDF document text
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/4264363.pdfIn PDF document text
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/2a9fcac45b38c.pdfIn PDF document text
    • http://axecheat7.xyz/asbestos_removal_guidelines_ukr8jsf.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/critical_history_of_western_philosophy_y_masih.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/kukolejasixase.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/tujugovejotowofixamigoj.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/bipepezuwed/searching_for_bobby_fischer_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/consuming_fire_lyrics_and_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/nunoxipelomijegosejinupub.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/unerwnschte_werbung_blockieren_android.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_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 5576 bytes
SHA-256: 1a5a24482cf4c8a34f2a2244e08f2f4dd3c1161d1b92c942f8d0229156522025
font_01_sfnt_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 10184 bytes
SHA-256: ac91926e0a8ca009ee181a17cbe89e180f5a80ad10ec4a68dfa1e09fcc603488