Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2d9b173eb60b0e…

MALICIOUS

PDF

84.5 KB Created: 2021-01-23 08:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ca1e80f9bf0643934a196a491af65d27 SHA-1: bd045dae12e506bbb2c0a82809f199419a361ad2 SHA-256: 9f2d9b173eb60b0ecfff5583d57678f155366c8b23c1f371671d228dc81d8931
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the nature of the PDF and the presence of many external links point towards a phishing or malicious content delivery vector.

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
  • 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.
  • 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://jottigo.ru/123?utm_term=mega+soccer+head+soccer PDF link annotation
    • https://cdn.sqhk.co/noxobabidof/VLydlge/dinosaur_survival_island_mod_apk.pdfIn PDF document text
    • https://nogusuxewi.weebly.com/uploads/1/3/1/4/131438155/87fa005e3a.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/jaWwwjj/tiefling_name_generator_5e.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/jbiIih9/35894140839.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/icQibgc/jurassic_world_survival_mod_apk_download.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/platformio_libraries_location.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/minuravifos_bifigobiv_mukopazanugo.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/bGoibSg/66957315755.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/8UNmi5K/schema_electrique_voiturette_de_golf.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/hfgjjdb/vapipafizujuvagafub.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/hGgh1id/dosobadolawokinitewedudo.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/Sgcwwif/sketch_master_pro_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/genijusemu/netflix_onto_chromebook.pdfIn PDF document text
    • http://rikovaniroxatox.rf.gd/twitter_api_developer_s_guide.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/product_costing_and_pricing_system.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_off0000fe15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 4728 bytes
SHA-256: 04966272ff3e8b437cc5c310b83ae0b90817d867d3f80fec4ad6cc002a57632e
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 12860 bytes
SHA-256: 394afa297bd0b5c2cba722b100644491f1e6d3f84c470dfe6d4691c2e48b005d
font_02_sfnt_off00013740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13740 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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