Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c35747bdc9fc2e…

MALICIOUS

PDF

70.8 KB Created: 2021-03-03 01:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5dc7ab162275fdc09b63a43fc36cd358 SHA-1: 3eb97c66d1a0f20c09b6834dea70af9ba9d6acae SHA-256: a8c35747bdc9fc2e96c6ace874be9a368c6dcba5eb60d476cf366670b34485c3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=staar+2016+answer+key PDF link annotation
    • http://springtea.space/60822800707ditcg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6039237b7fb45.pdfIn PDF document text
    • http://emirofficialzm.com/9200631583bvc52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff4dee235a9a.pdfIn PDF document text
    • http://uaportal.site/zadowulezekilividyj6jc.pdfIn PDF document text
    • http://mixed-rootwork.com/what_kind_of_heater_to_heat_garageoufct.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/29264758876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413122/normal_5feeafc056884.pdfIn PDF document text
    • http://chatik85939775.fun/sierra_65_grain_gameking_load_data_22-25098cfg.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/echo_cs_590_timberwolf_review.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/61506558967.pdfIn PDF document text
    • http://karnaval.host/le_capital_marx_nombre_de_pages7faui.pdfIn PDF document text
    • http://vofufime.mypressonline.com/17219847110.pdfIn PDF document text
    • http://idealica-ituficiale.website/google_form_sign_in_sheetp3s2q.pdfIn PDF document text
    • http://j3vnci4.xyz/manual_de_entrenamiento_de_futbol_pdh6brl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5ff8bcd53e2f1.pdfIn PDF document text
    • http://good-production11.site/93505732941qeo65.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/toguvaju/crystal_reports_datediff_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/golden_brush_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/bizajijabixar.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/p6_eppm_administrator_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/90320910011.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_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 5488 bytes
SHA-256: a45dd95e90a651cb39afb8f109651ac0ee3908ec57d2ddd2805e0a167297a51c
font_01_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 10392 bytes
SHA-256: 770353ab309bf698997d7b30771e66abf3e6da90142fcf4ad23fb03c8986356b

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