Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd939b3c8f999b98…

MALICIOUS

PDF

74.6 KB Created: 2021-02-26 04:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 408cb09ad98e88326e0fbae97848cca1 SHA-1: d60693d53242bb80d056399d7335fd9e8566d5d2 SHA-256: cd939b3c8f999b986a20f0b072cc8bc2c2fa01e507a0e88eebd8136782d79659
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://jacksth.ru/award?keyword=calories+in+boston+market+sweet+potato+casserole PDF link annotation
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/disiruvez.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/zagufil_nekobure.pdfIn PDF document text
    • http://velasibab.iblogger.org/apple_airport_time_capsule_2tb_setup.pdfIn PDF document text
    • http://tixshopclub.space/bubuganugokisivakewijaxrp46a.pdfIn PDF document text
    • http://4bochki.ru/how_do_i_program_my_harmony_700_remotewyrtj.pdfIn PDF document text
    • http://koteyarn.moscow/windows_10_32_bit_setuptv00y.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/91511135984.pdfIn PDF document text
    • https://tamidotojo.weebly.com/uploads/1/3/1/8/131858916/rewujemenawuboz_xiworupavirija.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/ee0e757e1289aaf.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/badodemebo/bhagavad_gita_chapter_16_english.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/calcutta_high_court_recruitment_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/ditelepos.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/13374626980.pdfIn PDF document text
    • http://nolutujurevovi.epizy.com/12304128921.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/icebreaker_worksheets_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/south_movie_2018_sky.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/bobby_deol_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/38655057827.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_off0000e73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 5280 bytes
SHA-256: fa37d0236d38ebb2a7f8e08d3d5b27428cb649e5e05492c78f06e91e258d4dfe
font_01_sfnt_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 10472 bytes
SHA-256: 8d43ff45768ac68a5106e353faa316104c6088251fc3315a5265380687392f75

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