Malicious PDF — malware analysis report

Static analysis result for SHA-256 8911885538ff9531…

MALICIOUS

PDF

74.9 KB Created: 2021-02-28 04:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f38a83b09ff50997de21d883cd5001f5 SHA-1: f60763c969fa2f15b4f70703d61b3b459b5e0863 SHA-256: 8911885538ff9531d780b51a7d474a64c05bca96d6cb8b24918c3ca5f5976ec8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pelibifir.ru/aws?utm_term=como+fazer+um+resumo+de+um+texto+grande PDF link annotation
    • https://cdn.sqhk.co/fajoliteve/HBnsgi1/m260_7_tube_rocket_launchers.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/21294205516.pdfIn PDF document text
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/9312309.pdfIn PDF document text
    • http://ompala.store/how_to_prepare_for_gre_subject_test_chemistryfg72s.pdfIn PDF document text
    • http://i-men.ru/modal_verbs_in_english_grammarnfakz.pdfIn PDF document text
    • http://umniashka.ru/windows_10_professional_version_1803u3nkv.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/lizuseguwix/awara_bengali_full_movie_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/wekikubezikotewetubogubu.pdfIn PDF document text
    • http://vegozuw.epizy.com/norunonitisosexi.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/6974187655.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/ffxiv_fishing_leveling_guide_70-_80.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/wemezipapifopeko.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/nelijisuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/can_you_run_itunes_on_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/99669086296.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_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 5220 bytes
SHA-256: a67e8f199ac097d6c9c7e071bf7eba1d77d0736476d22a351d17f3107191b522
font_01_sfnt_off0000f751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF751 12512 bytes
SHA-256: 6e12c85ba0b00ff3cc950fae858d47b71820d6449cf0ef44c0afbfe4ab32a841