Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee25f8805a9991b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-08 00:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 20a818bab7cb44fa951555fe2cd1632e SHA-1: ded741687d7b4628033c4b9575b9aa357413c416 SHA-256: 1ee25f8805a9991bd4f40abc4dc71c812700e04fb807901a703f66e350d2f111
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'Resumo historia do brasil enem pdf'. No scripts were extracted, but the presence of malicious links is sufficient evidence of an attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=resumo+historia+do+brasil+enem+pdf In PDF document text
    • http://idealica-italy.site/the_vampire_diaries_gifts_amazono229b.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/1454605818.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/27960130345.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/983280142037f1be.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/96011311522.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/hp_probook_450_g2_motherboard_price_in_bangladesh.pdfIn PDF document text
    • http://fb-ig-copyright.com/20711539213xel4j.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/ronixigowanukekitowux.pdfIn PDF document text
    • http://hot-money.fun/xonusu5ep85.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/65229483734.pdfIn PDF document text
    • http://jisuvakuwiraza.medianewsonline.com/58375226125.pdfIn PDF document text
    • http://coupons2020.info/lezumuverunutopaxkfq6.pdfIn PDF document text
    • http://yeswins.space/lumisajobedepibebizagifodgr2kk.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/minn_kota_endura_c2_trolling_motor_with_battery_meter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetovolixexa.epizy.com/comment_associer_2_documents.pdfIn PDF document text
    • http://nokarox.rf.gd/34491712406.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/40323645339.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/sipapibororudesetobaris.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/the_magicians_season_5_episode_6_promo.pdfIn PDF document text
    • http://dabirojab.rf.gd/xejulutuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 5428 bytes
SHA-256: 12f0cc2fc943c6e54c7b5a5eeed0c0982db35f8f62dabfb64607d77b088fe5dc
font_01_sfnt_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 12388 bytes
SHA-256: 6add1552aa40d7568a94fb0fdb73b7af1ecd5e9a83fa4b2e4f23a4d0e2a688ca

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