Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59c37e0e100e626…

MALICIOUS

PDF

171.6 KB Created: 2021-03-27 17:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef059370a82ae8f8e0824aa4585a2eb0 SHA-1: d19d4c2d6e24153c05a230893899c035ae276df6 SHA-256: a59c37e0e100e626273eabb0c6a4252c936e69fd99ebe1e33a555123904035aa
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is highly suspicious and likely serves as a lure for phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to downloading a book, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://maypoin.ru/award?keyword=biblia+cronologica+pdf+descargar+gratis
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fdf547ab9813.pdf
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/sixebizonawaposun.pdf
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5fdda1a97861b.pdf
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/4dfb143a77d0ee.pdf
    • https://nodefosodetapa.weebly.com/uploads/1/3/5/9/135978328/dafovurojizal-lomegemumu-xaxubi.pdf
    • https://kobosarajuxinit.weebly.com/uploads/1/3/0/9/130969632/b36e3248.pdf
    • https://penosemoboz.weebly.com/uploads/1/3/2/3/132302809/lugokikelesiba-vikulekobis-pebajaxijam.pdf
    • https://zetosodorab.weebly.com/uploads/1/3/2/7/132712291/winomawurevezur_dapalipogim.pdf
    • https://cdn-cms.f-static.net/uploads/4388818/normal_60314a2c53eab.pdf
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/9542810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_f95ed278ac784cc3831d3deff4285c21.pdf?index=true
    • https://s3.amazonaws.com/megelugik/moef_guidelines_ambient_air_quality_monitoring.pdf
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_6ecd53f9e8514b048c549fef3a29c19d.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_9664a5fc80dc4e428d6893fbafde6884.pdf?index=true
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_bcbfde145f48419f96e6cb030b07d436.pdf?index=true
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_c925e890a32649eb83c72a6635a91a4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3553ede9-599c-45fd-ac03-cfffb9336bfe/agua_para_chocolate_laura_esquivel.pdf
    • https://uploads.strikinglycdn.com/files/db9c2df4-3d82-4d00-bc4a-325b496bddb3/fagifobomasunubofa.pdf
    • https://s3.amazonaws.com/farefasejikap/cutting_edge_pre-_intermediate_vocabulary_book.pdf
    • https://uploads.strikinglycdn.com/files/29114a70-7bff-40a6-961e-2626ca202fa9/30948609905.pdf
    • https://uploads.strikinglycdn.com/files/1e07ff1c-38d8-43d9-b6d3-b69673d897b3/98906463646.pdf
    • https://uploads.strikinglycdn.com/files/595609a6-c7cc-44e4-b32e-a1ce59824e69/how_to_manage_your_time_between_work_and_family.pdf
    • https://s3.amazonaws.com/luborinizu/cva_wolf_scope_base_weaver.pdf
    • https://s3.amazonaws.com/jamuluvuvava/what_type_of_poem_is_a_dream_deferred.pdf
    • https://s3.amazonaws.com/luborinizu/pisufemakipunowojo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023255.bin
842def5bb6c7bdf39d92272b55ee77cc8aa77a5851b7065b61c42ee038afc3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23255 5512 bytes
font_01_sfnt_off00024514.bin
409ee9a3885541ffdc58d6bd2d6bfd260a46de59e4270c8c7780dd2af6cdbafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24514 1964 bytes
font_02_sfnt_off00024e6d.bin
380073f440e4f2da39bd8a11bce795ce7128a7b642f38f1a3e1677f729feee13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E6D 13704 bytes
font_03_sfnt_off00027b80.bin
2dcdfd72721fe66ca223e1a22600a257bfe3de53eee3600d78a5612392eedbf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B80 20320 bytes

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