Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcaede77c4dc33d…

MALICIOUS

PDF

94.1 KB Created: 2021-02-20 13:34:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f7f31dede437f40a9ead0e059df6627 SHA-1: f937c0051003af7f5875b68c7842113e28be6870 SHA-256: bdcaede77c4dc33dfcd7c0b256a98262dbb3e22388faaedb8abd464a21549f9f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=meaning+of+law+of+fossil+succession In PDF document text
    • http://trysucre.pro/kunujijizewidowavajexyoa.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/idhhgfF/persian_learning_books_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fcd629220568.pdfIn PDF document text
    • http://grampus-shop.com/kipapovatikenaxavewoxtfk6.pdfIn PDF document text
    • http://trycabinets.xyz/24550765325y43gn.pdfIn PDF document text
    • http://changely.club/bartok_mikrokosmos_vol_1_imslpwpma4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcd2f1574653.pdfIn PDF document text
    • http://fruitslope.online/luzarofifavuwuxonibisokubf2ssk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5fe88ea29e3e0.pdfIn PDF document text
    • http://pogadai.xyz/logo_dls_2019_arema3yi65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fef992e43710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gafedupeba/28318658371.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/vizok.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/56252488281.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/vixolox.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 4852 bytes
SHA-256: eb3467b078d9cdee848941124fa8c665f27d6e9aa71bc77bec0cc038a5580811
font_01_sfnt_off000122aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 10436 bytes
SHA-256: 7a3e56edbade1e7231291b1c43c1b39ce93b987c8870715233eefe5fa28ac77d
font_02_sfnt_off000146c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C4 16364 bytes
SHA-256: 1c8bc4bf779fdf5fdd428ab6ddc6a1665d3fdc1c26b4364692bd94c1ed605b78
font_03_sfnt_off00015c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C98 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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