Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5ea3d173b6122c…

MALICIOUS

PDF

93.1 KB Created: 2021-05-18 15:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d9c1dba833b499c555a977a0bd3686ac SHA-1: ef76ae69a66861ffdafca8e771f322e35255fb92 SHA-256: ea5ea3d173b6122cdc60aa5c20665ad284b6090f9915c6589a8679215933c470
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://soxebez.ru/strik?utm_term=skeletal+muscular+and+integumentary+systems+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444875/normal_600fa6b44f02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_5fd980ce6679d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5ff2e13f6e6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_6023c8ad59560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454168/normal_602a0bfcd1e02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8401a2e5-9b1f-47cc-bf0f-8bb1a3c34501/what_is_the_best_at_home_espresso_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/moruwenibupogupixised.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/examples_of_behavioral_interview_questions_and_answers_for_nurses.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/35860575545.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/diva_cup_user_guide_section_b.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/27097852002.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/wifoxujikulusu.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/35386702729.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/41514870222.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/the_golden_mango_lausanne.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/gagafele.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/chinchilla_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2a9435-28f7-4e74-9f9f-5a0724cd29cd/the_adventure_zone_here_there_be_gerblins_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/what_does_prevailing_wage_include.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/animal_farm_test_review.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/brother_hl-2140_laser_printer_toner_cartridge.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/79200773828.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/46440137573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a730bfd-dfbb-460b-a3b3-a3437c3b9104/beats_solo_3_wireless_on-ear_headphones_satin_silver.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/93256854179.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/zesolugepuxoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/94069179744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9678bdac-0b3c-43b8-a83e-60c8c806f7bf/kamamusebugodabasakewa.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/heidi_cartoon_movie_english_free.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_off00012c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5E 5716 bytes
SHA-256: 07eaa02cfab38bbdaba2a4a8085a717af086f7d7958dce20677805b76a75322b
font_01_sfnt_off00013fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB8 11084 bytes
SHA-256: 864e2d51b1a264c1e47e685d31d75c6e15ac834f8c023c60e3dcfbeed90eb633

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