Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cd99cfc221e8f0…

MALICIOUS

PDF

73.2 KB Created: 2021-02-18 14:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bb8285a91d18b1ccec7bf3ea4daf5e91 SHA-1: 73cb4172c0b7d2dde4e2eb244a04be6822ab4779 SHA-256: e3cd99cfc221e8f0195a2bef6d46797113cea4762684372a57a48a42e9ef9472
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=hawk+freedom+squadron+mod+apk+latest+version In PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/voxaxo-dijujodosolusod-zevomogupofa.pdfIn PDF document text
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/lunuwame.pdfIn PDF document text
    • https://jobifavizatop.weebly.com/uploads/1/3/4/1/134108852/dibin.pdfIn PDF document text
    • https://garuvopu.weebly.com/uploads/1/3/1/3/131398288/1031238.pdfIn PDF document text
    • http://zunowugijose.22web.org/53010259480.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/gjgeJGJ/70908446113.pdfIn PDF document text
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/bogevijimu_pemozewi.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/323258.pdfIn PDF document text
    • https://bifetidenogu.weebly.com/uploads/1/3/1/3/131379340/jopiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/dfIyB1s/lynx_black_cat_hybrid_review.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/jgC2M53/funny_cat_wallpaper_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/jgQEhj2/wazijurirasapopabi.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/muwemivumazulax/chief_wahoo_pumpkin_stencils.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/83075755365.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/64640585478.pdfIn PDF document text
    • http://vavijirodujozi.rf.gd/movie_counter_hollywood_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/report_cover_page_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/calorimetry_lab_answers.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_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 5492 bytes
SHA-256: d6c3a9bccc4eb065b485340bc7259b3c3a98bdde815c2920b1faa01696a5a4b8
font_01_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 10240 bytes
SHA-256: bfb36f5faeabcf2e6aa42c2d7206f8d86a00784e497b523cca422b51f75d819b