Malicious PDF — malware analysis report

Static analysis result for SHA-256 391c3df679d0ac4f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 17:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cd1d58468f81953dbaee2ec056ffeed4 SHA-1: 2bfd969794e73adf8b87f27fa80b8628aee487fb SHA-256: 391c3df679d0ac4f8421fd175cfad52cab7a6f62875a43926ba26f1617e93034
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://crophysi.ru/wix?keyword=hack+soccer+stars+miniclip In PDF document text
    • http://loduwij.scienceontheweb.net/how_to_understand_the_bible_better_manly_p_hall.pdfIn PDF document text
    • http://indir-kazan.com/4528838248896pvq.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/depikarik.pdfIn PDF document text
    • http://naturmilans.fun/mumisavobofepb0pdy.pdfIn PDF document text
    • http://henrysavbr.site/mla_format_book_with_single_authorah8zw.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/6860971.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/3439615.pdfIn PDF document text
    • http://tokio-2020.fun/invitation_card_template_word_freewj1gm.pdfIn PDF document text
    • http://arm-watch1.club/moxidonovobugosilovujavepdokye.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/276188516833r38t.pdfIn PDF document text
    • http://instas.site/34424231484npxw8.pdfIn PDF document text
    • http://hookup753.fun/white_pomeranian_teacup_for_salewhh9m.pdfIn PDF document text
    • http://uplrezina.site/comcast_xfinity_code_s0a00vluml.pdfIn PDF document text
    • http://betmoy57.com/ipad_mini_2_screen_repair_near_mee1zql.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/jorokipolome_xigopakek_mijana_bipuzopiriloj.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/dikobepibelun/outlook_2016_auto_reply_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/pigukejokiwebaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/beauty_and_the_beast_disney_song.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/51534686835.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/fexinoraperenudaf.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_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 5104 bytes
SHA-256: ce4b2a7c15d2112906eb4352b33d880ebd6e6efcfa00f17e07cc7186f346f03c
font_01_sfnt_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 10156 bytes
SHA-256: d88abe95ceeb61b3c1f9cfe471e27a189e48bf4cd788ad6f8357307636b2cec6