Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd55458de790dba…

MALICIOUS

PDF

81.7 KB Created: 2020-12-10 00:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52b616798c652b8a7125946ff0c1d7b9 SHA-1: 9789d53e84148f8079650e7b46cf13e8f16fcde6 SHA-256: 1bd55458de790dbafb26f8ad029ea0e7c6fb9563615007365ead260b231cd058
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=dones+y+frutos+del+espiritu+santo+pdf In 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/golepe/nasabak.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/words_with_the_letters_anstee.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/nonifeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f714e76-dfe8-49e3-b842-4d98d90ea371/fatal_directx_error_code_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2b72bbd740658066ec4/t/5fc3a67118e72e5fdb479242/1606657650042/standards_focus_elements_of_style_lord_of_the_flies_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/download_fnaf_world_on_mac.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d5cf7d0c8f249d62c5dd/t/5fccafdc5177ea328cbe441d/1607249887369/bawezazafudopisiruf.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/router_guide_bushing_dewalt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ebbeff13940aa24cd01f/t/5fcba4a11415195da089c576/1607181475925/86525926480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87697ba4-be81-4e9c-98c8-3b8847af304c/vtmb_sabbat_vampire.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5696860f2895dc1061537/t/5fcbbb720814be4f73f080de/1607187315003/rock_and_roll_songs_with_guitar_solos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a834abaecd33182d7d6c/t/5fc6027561e25426e1066bbb/1606812279419/66524010314.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/apex_legends_season_3_ranked_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 5016 bytes
SHA-256: 643048bcfde9da4cc50037ac39e3973f9225008de13a622c192c2945771960b0
font_01_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 11816 bytes
SHA-256: 36abfba1f634bda7bc1e2438f0f057d1f3e474208ec02a716f33ad03cad48f58
font_02_sfnt_off000129f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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