Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b516eea29a2699…

MALICIOUS

PDF

70.9 KB Created: 2021-03-02 05:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f45c04062260325e8879ca31839f946d SHA-1: 71d8bb76dc45e1bad83903c31c084b94cda032f7 SHA-256: 37b516eea29a2699b6aa39a5352fc24d5ed589d2d33af7540ea9743a5dfb12a5
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://gimoguvi.ru/wix?keyword=wilson+elementary+okc PDF link annotation
    • https://cdn.sqhk.co/tivinarafuvu/NAjhSja/37169930385.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/0b32f24a81d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5fc9f72108cd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5feb8d439d6fd.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/Bijpii3/94758889503.pdfIn PDF document text
    • https://lukigozijejis.weebly.com/uploads/1/3/5/3/135398738/kogimarav_zifemeketi.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/5470251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fe027f5b09b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5fdf4824b5808.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/iaN9njd/44588479839.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/aihRTHP/pastimes_ripon_menu.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/will_there_be_a_sequel_series_to_star_wars_rebels.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/nevowimo/bstc_2018_result_how_to.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/jogurezazaromiwaju.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/watercolor_brush_free_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/porter_cable_band_saw_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/73128908458.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/android_high_graphics_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/nugozokemaxusalebizoda.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/15757078082.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_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 5124 bytes
SHA-256: 22caa57327c2a1652a9c6b3838537267d10a15f18b7f31c114720db3dac45c1d
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10768 bytes
SHA-256: c2babdbd3f1b1042820f1b6f6416efd06df4deab22e3d75a704ceac8f49771eb

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