Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe04a459002a8a5…

MALICIOUS

PDF

69.3 KB Created: 2021-02-18 22:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 357fc8b6f8962eba35091936a4fce1d1 SHA-1: bf9562b96a54943e72ecaa6bf3f30d22958f26dd SHA-256: bfe04a459002a8a5191697cc31d8b907bdbdbdadc5de36abc07eb7c3429d658e
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://jottigo.ru/wb?keyword=legal%20terminology%20dictionary%20pdf PDF link annotation
    • https://cdn.sqhk.co/tedalome/qZjhheg/hide_and_seek_rpg_game_download.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/1071850.pdfIn PDF document text
    • http://yatvoyya.fun/zenusunekasimutasimomesufn38td.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/tebaj-xexumok-xaveko.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/materi_akuntansi_keuangan_lanjutan_1krztd.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/3giPbFy/37973845488.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/eKgdhco/36853873745.pdfIn PDF document text
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/3575539.pdfIn PDF document text
    • http://strita.space/73710338165laucb.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/gd7gfOp/sowizevabix.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/poxasasetedilo-gixupojoniwos.pdfIn PDF document text
    • https://cdn.sqhk.co/tumokufagu/dHhagjb/looney_tunes_world_of_mayhem_action_rpg_download.pdfIn PDF document text
    • http://buybritishcat.com/stochastic_calculus_for_finance7ao33.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/gezetega/american_sniper_tamil_dubbed_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/autodesk_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/koxunijiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/hnbgu_b._ed_online_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/british_standard_for_transformer.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_off0000d2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F2 5340 bytes
SHA-256: eb472719873cd3bbbc95d0ef4636c11c379aa0ad7892674fabebe708a49f1bf9
font_01_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 10256 bytes
SHA-256: c5e2dc5dfdc31a6a3d1b6ef0b767f775d5bae578607c1d4dd481b5b713bbd86d

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