Malicious PDF — malware analysis report

Static analysis result for SHA-256 7031e326e90f42e7…

MALICIOUS

PDF

69.4 KB Created: 2021-03-01 21:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 40d2b822fb098332d08d5cfd6d400241 SHA-1: dd075603ba363b73709ca762f26fb865167c80ae SHA-256: 7031e326e90f42e7f007b30d5bb056a6baadaef8c861301c5ad84ddf8e2dbc7d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/award?keyword=percy+jackson+and+the+olympians+books+free+download PDF link annotation
    • https://cdn.sqhk.co/seseniluvus/cuhgGpQ/23298791418.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/lhbigha/zombie_shoot_pandemic_survivor_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fd96dbb69e8f.pdfIn PDF document text
    • https://degitetebumike.weebly.com/uploads/1/3/1/8/131857056/votisi-jodukoxaporen-zuretobod-sowubum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ffb5e6baa6cf.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/gjgjeXu/boss_loop_station_rc_505_manual.pdfIn PDF document text
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/6ddd0a7c0.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/tojazudibumogab/jivatibatubuvopuxedu.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/68561819421.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/am_not_good_person_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/tutorialspoint_online_java_formatter.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/vefigaraborenofalubudenel.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/professional_development_self_assessment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/clavier_azerty_sur_tablette_android.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_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5868 bytes
SHA-256: 2c3c4f4feeea8617724b1a8aa4490aac9d13c5735d1e5f5989a6307d239f8ce2
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 10268 bytes
SHA-256: 0bd317da40eb203c84d050e9ddecb25815a54c6a6258a8c7e39d49961d78b075