Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e28fa4a4775ee3…

MALICIOUS

PDF

74.8 KB Created: 2021-02-06 17:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 54899c756337e9526663e8c2b3bcd296 SHA-1: 92221816c0c19819ed7207db86e3c489d8161d84 SHA-256: a3e28fa4a4775ee3e958cb10195a9348fb92ee00fa98aafc7d74d69e5938a465
224 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/aws?utm_term=camden+parking+permit+refund+form In PDF document text
    • https://cdn.sqhk.co/lofakekaf/Rwgfdig/why_is_my_minecraft_server_not_loading.pdfIn PDF document text
    • http://card2card-perevod24.site/dibujos_para_colocar_nombres5te5g.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/edjfA3c/monster_jam_steel_titans_gameplay_freestyle.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/DkijcNJ/tower_defense_games_pc.pdfIn PDF document text
    • http://ipoteka.net/sikexisesikinebujado6u5uf.pdfIn PDF document text
    • http://dressnbuy.com/51052997u6oad.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/jdxjbWF/44133991078.pdfIn PDF document text
    • http://agreevudb.rest/softly_and_tenderly_piano_sheet_music185d6.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/eAMjfhc/39145830466.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hed0giN/samsung_note_9_secure_folder_missing.pdfIn PDF document text
    • https://cdn.sqhk.co/telupiza/Yamgehj/27549621722.pdfIn PDF document text
    • http://luminar3-download.xyz/fegejixivegugidst3qp.pdfIn PDF document text
    • http://eduha.online/17406958023iy1re.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/kafises/ganobojanujovoxumexu.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/pain_gate_control_theory.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_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 5120 bytes
SHA-256: 54bfd080c3baa26ea20783680eec9ad6b0818a9893cf1daf219bfb5368d1a464
font_01_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10780 bytes
SHA-256: d3a2f2e9b76be747af98b2e81f25a86ce4e8fb9489e4a3cb4f2fadc7d8b1fa43