Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5df2686a318773…

MALICIOUS

PDF

111.9 KB Created: 2021-06-02 03:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c575591cb967e91d428f4a0a54f7dda SHA-1: c8f4e395816d32ad728a16fc7cc57e0d8536d908 SHA-256: 0d5df2686a31877322f14da0d2bd96d6f67d0a9be6cbe3e25a0e70142f0e816e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://yafferge.ru/123?utm_term=exploding+dots+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_60361843881e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403560/normal_60068d3be2a6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff9c8adef54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_606dfe33a2be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_6033f0d638abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_6060e25d59648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_601a093b686c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_604af467a1d24.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/97fce685-1f34-4a96-9ff0-d5da859ea521/mekejibisagetazivon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84427cf6-6d63-4867-8bfb-3614f16d3dff/dr_steven_gundry_the_plant_paradox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a48dd11-7d5b-4955-a192-dca47cddae05/86676787426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2171ced2-1a2a-4654-b245-589052bd8eef/sixegetazarawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a4eded-022f-4d62-b44a-a4a371115faa/hardware_and_networking_interview_questions_with_answers_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/792aaf16-2ef3-4159-a611-e3312908aeec/hpi_baja_5b_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e740461d-e975-45ff-bcd8-7c02244553cc/how_to_put_music_on_ipod_nano_6th_generation_without_itunes.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/monopoly_south_africa_rules.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144451974/60025409835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5516c52-e211-4aac-bf48-5aca69765077/xutirobubenupowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534b4f8b-bfdc-44cc-8d8b-677d02ed652f/frayer_model_template_6_per_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0db85d-da5e-4a39-acf8-e3b894bde611/83870207620.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_off00017815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17815 5192 bytes
SHA-256: 237239bce99fdd74c83c45035e806e9e76d90eb9552312dc5aea9808705b6bb6
font_01_sfnt_off000189d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189D4 11356 bytes
SHA-256: c4621ad9e83ba8ad4e64e8778e44e53f00145d78277c37d0303348e4b1c1a3c6

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