Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6d3de1b5dc5a0a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-13 18:35:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db10f992c7cd3de080cf53381c0612fb SHA-1: e105458c77a35de218ca5a1adf4f19aa3611f95f SHA-256: eb6d3de1b5dc5a0abaaba52c3faa5c6a50654a332f74e6d38a49d2e6b5d65e84
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to downloading an 'English grammar book'. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful resource.

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
  • 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/strik?utm_term=english+grammar+book+in+tamil+pdf+free+download
    • http://mpvideo.org/salicylic_acid_fragrance_free_cleanser47ut0.pdf
    • https://cdn-cms.f-static.net/uploads/4390659/normal_60103b9d5ac9a.pdf
    • http://motivawka.online/817453789740ozlj.pdf
    • https://cdn-cms.f-static.net/uploads/4412160/normal_6017d6ca6031c.pdf
    • http://lumapon.iblogger.org/flutter_box_decoration_cheat_sheet.pdf
    • http://trendmobile.ru/gilgamesh_stephen_mitchell_summarykb0y6.pdf
    • https://cdn-cms.f-static.net/uploads/4478968/normal_603bfc7f2463a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/80738eb1-89fe-4c33-be87-c839ba92c565/english_lessons_for_esl_beginners.pdf
    • http://radujexoxetapil.epizy.com/jibagepapuwumavorek.pdf
    • https://uploads.strikinglycdn.com/files/811e257e-8698-4c84-86ea-fda47250d733/what_is_a_subtropical_gyre.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/34497682501.pdf
    • https://uploads.strikinglycdn.com/files/1ac96e13-155c-46fb-a720-c2966c92119d/25863617907.pdf
    • https://uploads.strikinglycdn.com/files/cf99b8f6-c575-42ea-a5d4-0b16e1ea6c33/91706014348.pdf
    • http://pexagawilifun.rf.gd/limited_service_retailer_definition.pdf
    • https://uploads.strikinglycdn.com/files/0152e4aa-3c89-495e-a243-392ce41a073b/how_to_use_trade_options_on_robinhood.pdf
    • http://jinujatafariva.rf.gd/porojogida.pdf
    • https://s3.amazonaws.com/tobaziw/allen_carr_method_reviews.pdf
    • http://debagejusuwaj.epizy.com/15446568683.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32b.bin
8bb35e3b8bbb20fae17ce60ceb1ab1e8aa2228ff5e0a945bfc91a28fddafd838
pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5496 bytes
font_01_sfnt_off0000f5b8.bin
8e1b0074332d0cd5a390aac7700a8b8cd25d312d67a92375b85e10e21952c71b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 15204 bytes
font_02_sfnt_off000125d3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 4324 bytes