Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f389a3249a24d9a…

MALICIOUS

PDF

71.0 KB Created: 2021-02-08 08:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 75f60b6d9f57d31117dfffcc45925823 SHA-1: 2991c50ea3e55c6c01b8e8af198af843e3452122 SHA-256: 5f389a3249a24d9adb3125390a4c0d00bac663d201d6c03a2db169b18b30855c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'questions and answers'. No scripts were extracted, but the presence of external URIs and the phishing classification strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=mmpi+questions+and+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486042/normal_5ff27367e9b92.pdfIn PDF document text
    • http://islta.fun/99526269170x08ew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_601df5ca95afc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481154/normal_5ff022461a84b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_600179db9d437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_5fdb13a83aa4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5fcd8d2f5f52c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_5fc7dea4c86a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_6011a61ba8b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426277/normal_5fd9abb5849c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_5fd79f594b74c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6020af19be95e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_60130b5e17209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5ff8a4e3ca4bd.pdfIn PDF document text
    • http://generalmassage.online/tikunotuworuzoheq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5ff6245b42e21.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/mipizaju/madura_dictionary_free_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/ielts_4_reading_test_3_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/bugesigewerivenesalibaxe.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5296 bytes
SHA-256: 30a1ef59975ed442fba2f7a0928142ce8c849e23d0e703825f89f5e8e6801dea
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 10336 bytes
SHA-256: d130fad5c915f993aa088f0e52acf20da0b006c01118c50d2b99330a46e6f9e9

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