Malicious PDF — malware analysis report

Static analysis result for SHA-256 598df95a79ccb128…

MALICIOUS

PDF

81.5 KB Created: 2021-02-11 14:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1b3acae9ae165e57258c95ab7b4d586c SHA-1: 900c27a2ae5dcb309dc51262e28435c70f163328 SHA-256: 598df95a79ccb128babf47d164f96abfd2897e31404681ba855485622f674ca5
196 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
  • 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://seumenha.ru/wb?keyword=ragnarok%20mobile%20homunculus%20leveling%20guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483072/normal_5ff4d8c088a2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459170/normal_5ff5880987933.pdfIn PDF document text
    • http://sellforce.ru/fist_of_fury_bruce_lee_movie4sjvp.pdfIn PDF document text
    • http://vkysnaya-eda.site/escala_likert_enfermeriao1uzc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_60052c066446b.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/ibggEij/10438411080.pdfIn PDF document text
    • http://kraftmann.su/83819132138hrm4q.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/sdjfKji/best_shooters_2020_nba.pdfIn PDF document text
    • https://gutamunimidujad.weebly.com/uploads/1/3/4/6/134667749/bb4687c68d7927.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/fA1eGij/75501735288.pdfIn PDF document text
    • http://kinokaiff.space/jesus_bleibet_meine_freude_klavier_notenjpf51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_600a027f424cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5fc96de0498fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_60190cc09519e.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/Vohecgd/ladukakedevozopibodir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 5624 bytes
SHA-256: 4a3138a4267b0b239999df45d6ca5edaf6a67ad1550bd69b8dbc095b17a1e444
font_01_sfnt_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 11980 bytes
SHA-256: 7fc23c62433e1799955fcf433d7218c1163979dbddec18845dbe2d1098136ba3