Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed33cbc6ec0c9f32…

MALICIOUS

PDF

109.3 KB Created: 2021-02-05 22:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fa2ca633fe9819dc396db96b655fce88 SHA-1: 7f30cd84455a0d9d481afeaec491117ea391f88e SHA-256: ed33cbc6ec0c9f324514b59aa9bbae0911506d76e223b6574963306ee699901d
96 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 flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to redirect the user to a malicious site for further exploitation or credential harvesting. The document body, though heavily obfuscated, contains text that appears to be a lure.

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://seumenha.ru/123?utm_term=requiem+in+d+minor+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5fe445d3a3ef6.pdfIn PDF document text
    • http://momentshop.space/address_book_template_google_docsapfsz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414689/normal_5fca28a9ad772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fd67e1f797b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_60103a0bf2912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_60033afc64702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5ff7ad9bca5c7.pdfIn PDF document text
    • http://draiwenstore.online/45523538270dnima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5fd1c36ac57c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485591/normal_6010efaa16b33.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/gfijEgj/dojata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fcd6e7828e36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5fe0d141af998.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/bepukuba/68520930352.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/89526264082.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/google_classroom_apk_for_android.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C2 5112 bytes
SHA-256: 08e05d32a09534012c830f63226324e14d6a9a379d8508e3b56ddca1be79c2f5
font_01_sfnt_off00016b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B19 12696 bytes
SHA-256: 9097e212f5316fdc7bb104df9099d5aa8409eb6782cebab4dcd64384ed8cd1e8
font_02_sfnt_off000192ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192AD 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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