Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcef0dab2bd8f41…

MALICIOUS

PDF

79.4 KB Created: 2021-02-06 07:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6be0cfa2790893637b524638ca34ea2b SHA-1: 7a4c81830b02ec0a167330886f6919eb2fe3b04b SHA-256: 4bcef0dab2bd8f4146ec841d626819c68f79fe104b94b2cc280931d375388490
172 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=minecraft+maps++xbox+one PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456728/normal_5fed60b7a2ed1.pdfIn PDF document text
    • https://cdn.sqhk.co/vogidasobe/FjbC3ih/senemak.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/whhifcI/hero_dash_diecast_spinoff_mini_game.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/idRijiI/95213125019.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/hdgiiha/vadeginixulekewebusisese.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/YiaISii/frontline_commando_d_day_mod_apk_techylist.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_601b01317df13.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/levijifume_keziwepil_genefivowarolad_kafigez.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/dRififN/93597249341.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/60447df22cf07.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/6jdXgf1/samujijavabi.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/nihhgXi/89780238265.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/gc1ohgH/sorufitesokurezaripid.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/9dccjca/space_live_wallpaper_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/Ihihbhf/lejezepagatuzi.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/sizadagazagaj/95716306319.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/xosuxalejekaxabapo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/3654473110.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_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 5340 bytes
SHA-256: 4b897533d5235f5b6e323e324225e58302a9b89ba2c2448a0f0ef4edf8535e44
font_01_sfnt_off00010c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9E 10496 bytes
SHA-256: 29cbe64920b38e67a58b000c3086d44e3fb9cbfde81f56ca8a3a1454fd693afc

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