Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4aa50ae5eb7130c…

MALICIOUS

PDF

72.9 KB Created: 2021-02-15 02:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 330d346d0f381e3a9f4426a6866b36ed SHA-1: 267139f364d1a53b65b93362cc239af170175a1c SHA-256: e4aa50ae5eb7130ce4fbadfa5d984d7c153460b8030e471af0ea3d9f04ae2e11
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high probability of malicious intent. The presence of embedded URLs, specifically 'https://leonvi.ru/aws?utm_term=presentation+signpost+expressions+pdf', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/aws?utm_term=presentation+signpost+expressions+pdf PDF link annotation
    • http://clipshd.design/california_employee_report_of_injury_form4347n.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/ihgRyrW/29676651603.pdfIn PDF document text
    • http://autoport76.online/warcraft_2_apk_data_downloadiwxop.pdfIn PDF document text
    • http://magnetfix.store/glow_balls_for_dab_rigrj57e.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/JBiighK/capital_group_american_funds_529_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/J4jijfi/43650571222.pdfIn PDF document text
    • http://centerbluebadge.com/aciera_f1_milling_machine_manual4jg8h.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/E9jht97/the_last_stand_union_city_hacked_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff69ba91fe73.pdfIn PDF document text
    • https://cdn.sqhk.co/gepibilis/JIjj2hg/84261131569.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/sazixipame/scholar_ffxiv_guide_5._0.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/42488365560.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/nupuvelame.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/college_financial_aid_appeal_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/solitary_reaper_question_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/87793854636.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/zilejigezedugifo.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_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 5036 bytes
SHA-256: 147ec61b772c84889dfa159e24a6fa4ea67b72ac5073ca5a384284f09e8e14be
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 11008 bytes
SHA-256: 7b29d9c9ddcd061c7ac48faebaa2d314ae11352be4f7c23dbecd9876cc7919aa
font_02_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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