Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0625ac246f0b9f7…

MALICIOUS

PDF

74.4 KB Created: 2020-12-18 20:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3d6ebdaaa8dfdc8d2f39ba484faea3a SHA-1: cc99ef6c74165e97a5d5d19e1fc317fda0cc2b76 SHA-256: d0625ac246f0b9f7db355fa3f1add7ec7bd92259790e08be6f5ceb1b1bda4f47
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URL that points to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to statistical tables. The presence of a malicious URL indicates an attempt to redirect the user to a potentially harmful site for phishing or malware delivery.

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://gettraff.ru/strik?utm_term=tabla+z+estadistica+para+que+sirve In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcdf7b2b9ec03672fa6d5d6/t/5fd609ec5b1f6f7539cd6875/1607862764702/loxivalegi.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/vojoxobunejuxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b5908b9e860b7b22bd08/t/5fc86a29d32d012678f94dd9/1606969898914/1353365152.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/wunovilakabo.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/29669078242.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/maroa_forsyth_school_district_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed11c07-3e4c-420b-ab71-bccfdc142750/cole_symes_coffin_and_stacey_western_civilizations_brief_4th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1a873299f0c5438cdba/1606218152559/76207540346.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf642705f6b5d2cc370b9/t/5fd137c2e09a1e6e1d95ae5f/1607546833167/ace_money_transfer_pakistan_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/74479732117.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/qualified_dividends_and_capital_gains_worksheet_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf5182665af30590bf3305/t/5fd666789264095525d43d8d/1607886457582/weather_worksheets_for_kindergarten_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bca0aa0dc1643a2ca0c5/t/5fcbb3af190ee82df8e2d300/1607185328833/konakarijiri.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_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 5392 bytes
SHA-256: efac18e5a6916c5f8b66b35cb79fe7b176d15fb55775a2a307613432ba3214f1
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 11808 bytes
SHA-256: 9549eacff018766d24150f4b575d185c6f26d255da0f6d50b75675651067f8d2

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