Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ffa706f5850b29…

MALICIOUS

PDF

94.3 KB Created: 2021-01-18 01:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 46e8b02f5c35b7e89b3a89d2c1320b9c SHA-1: 7f4624e21d48e4ed7a8355c273c57d6fcc8631bf SHA-256: a9ffa706f5850b295ba503dd99fb0701588783c84af1820ba356b2c988495a99
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a 'trophy guide', likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of the external URI and the high confidence detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=kingdoms+of+amalur+trophy+guide PDF link annotation
    • https://cdn.sqhk.co/bepemuno/jivhdnF/mimanilifusenazesatawowaj.pdfIn PDF document text
    • https://site-1175916.mozfiles.com/files/1175916/amoled_pro_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5fb75e79b35ef.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/akkhcjg/gtr_traffic_rivals.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/jfEx9z7/dining_table_set_for_6_ikea.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/jeTiigg/moviepass_stock_price.pdfIn PDF document text
    • https://cdn.sqhk.co/pekuwalixeso/Lphhhgl/league_of_lords_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/lhaDeLb/road_to_valor_world_war_2_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/jZhjIe6/matagoxegabuvilefud.pdfIn PDF document text
    • https://site-1235418.mozfiles.com/files/1235418/worksheetfun_days_of_the_week.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/zupenafud/whirlpool_gold_gx5fhtxv_q.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/86736695536.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/divemunotegexatanokoli.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/four_categories_of_application_software.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/picadura_de_araa_en_perros.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_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 5524 bytes
SHA-256: 4ea82ed55dbbcceaf85f6550d26f620f0cefa3e9836d546e64f8fe96a53f22b8
font_01_sfnt_off000146cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CB 10476 bytes
SHA-256: 178bab2a1ee61ba32f974d75aae94556d1882267875822f1fe69bcff5fa09428

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