Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f769ce066e31d82…

MALICIOUS

PDF

60.7 KB Created: 2021-02-18 07:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 95dd0e252429af734ce224e7558ec3a0 SHA-1: d6649ea5129ca9280cf7024934f466711795cf21 SHA-256: 4f769ce066e31d82aa0debbc6380ac205857e348131f443101c95965e96f6c18
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=horizon+high+school+bell+schedule PDF link annotation
    • https://cdn.sqhk.co/fovudadeweto/ifgchit/maps_of_clash_of_clans_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/fDiiYie/funny_comic_for_among_us_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_6024ff107721f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_60196992115fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_5ff71278d22de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5fff079ae82d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_600b78167afc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5ffa15e3c9314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_60288d9167e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5fd33fd0826de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421466/normal_5fccf62ac8fd2.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/bhdgd7C/fishdom_app_free_download.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/piradi/best_ad_blocker_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/10747217911.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/pafofafusakituzogexo.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/78398165209.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_off0000b2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EF 5140 bytes
SHA-256: 25908fdaac8c8a5852dbd1dc22af19ea5a584c4af807497dc6f8f162287277ac
font_01_sfnt_off0000c46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46E 10016 bytes
SHA-256: af41ae296b1167dc6c931e561c675511816a94eee5a60d59020f70b143407c48