Malicious PDF — malware analysis report

Static analysis result for SHA-256 644eaca3617c2244…

MALICIOUS

PDF

72.9 KB Created: 2021-02-06 19:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ff354619b841aa029b6da8be4d7d656b SHA-1: 20b1985bbe637bf7d671e4f4ee6689f13e204ec5 SHA-256: 644eaca3617c2244252f7cfe0ef6c37eca72c89c19631b4d5f914f420e37c1fc
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 ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a celebrity style guide, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/aws?utm_term=angelina+jolie+style+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5fdfb2e46f428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5ff097ad4773e.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/ieee_software_architecture_document_template.pdfIn PDF document text
    • http://melukutirigap.22web.org/febrile_convulsions_guidelines_sri_lanka.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/enter_usb_bluetooth_dongle_driver_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5fe4e0d7b6b08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410976/normal_5fec8c5a72416.pdfIn PDF document text
    • http://mivejuvididu.66ghz.com/34918396056.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/widofafane/zutejijuzi.pdfIn PDF document text
    • http://jutibigata.epizy.com/vusodogote.pdfIn PDF document text
    • http://xudadadof.epizy.com/9991176493.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/41490721749.pdfIn PDF document text
    • http://zapulozamatuwe.epizy.com/68326414956.pdfIn PDF document text
    • http://jukikusikodopom.epizy.com/fogirutafujafefetozasu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/84046974908.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/license_key_for_driver_toolkit_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_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 5064 bytes
SHA-256: ccac7add3a5020c7ee52d293d7aca086cd3a0a593ef86f72bea14a62dad00da9
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10524 bytes
SHA-256: 3e3f254d44360d2bd71295fe67526fa9665282e028b1d25af1092267c16ce0f1

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