Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c80eb090003978a…

MALICIOUS

PDF

77.1 KB Created: 2021-02-20 12:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6981447bffe8db14caadc1187ee52680 SHA-1: b30f78a55df5b804e1136d96b58e8302de03966d SHA-256: 8c80eb090003978afe0872374856b237d3674fba5e4b0d9e8472530d8afd5666
254 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
  • 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.
  • 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/wix?keyword=gba.emu+apk+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fe6df8347383.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/vabofoda.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/taxupadelof_turixijimosovu.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/pivetuzadujo/jake_from_state_farm_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/christmas_carol_songs_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/wovavovanuzigepuzudisuwan.pdfIn PDF document text
    • http://zavedofidime.rf.gd/dogixawijugov.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/glacial_acetic_acid_safety_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/how_to_format_sd_card_android_marshmallow.pdfIn PDF document text
    • http://kewuzelaxapog.rf.gd/nikon_dx_35mm_1.8_g.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/94200509884.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/king_size_deep_fitted_sheet_cotton.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/22933291640.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/enya_amarantine_album.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/kebizixapokumewuvujo.pdfIn PDF document text
    • http://xitugukunorijiw.rf.gd/la_cancion_de_hielo_y_fuego_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/95308124701.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/wimakulobavomefakoxu.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5448 bytes
SHA-256: 7ce77ba296796bba5475cbbd8517d9f6c13d65e61e738d6920039dbb55ef18d8
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 10540 bytes
SHA-256: d66c0c729241197b80a6700d844a8192f1d0da23e0b3bbded3378ec245d9a782

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