Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ed5b004c83f19c…

MALICIOUS

PDF

63.7 KB Created: 2021-02-12 02:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 21061f8822884e1322afc2bb0b829395 SHA-1: b1a5c96e7522ab59f162e4d7baaa911b2a582461 SHA-256: 31ed5b004c83f19c2d8d081b4114f45a113b991f5e96c2246c24c0d8a608c04c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=rollercoaster+tycoon+4+mobile+hack PDF link annotation
    • http://fionainthefield.org/life_below_zero_torrenteme3m.pdfIn PDF document text
    • http://womans30planet.com/psp_cso_games_under_100mb_downloade7u3n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5fe0080a166fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_600bc09c6294e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385422/normal_5fc95d69b7a9e.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/igeX6jh/kidoxarubiditonexamikaji.pdfIn PDF document text
    • https://cdn.sqhk.co/kabolode/ujdoshd/mutiny_pirate_survival_rpg_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490123/normal_6016227aad866.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/vapelurowar/39346147981.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/16972476281.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/isaimini_movies_2019_2018_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/57594846753.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/adform_dmp_login.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_off0000be4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 5440 bytes
SHA-256: e8ef450c7daca8a8fee613bee4eb7bfd5baed6e48b8e01120f271abcacbe3ce6
font_01_sfnt_off0000d0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AF 9780 bytes
SHA-256: 26c06312ba1ba25ac451036a1a96ba1c25ca8e77e820a7551936f096d961fe8d