Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a7fd3e763ae1cc…

MALICIOUS

PDF

86.0 KB Created: 2021-03-20 16:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792ae6dabb0b3a70c44781651268b542 SHA-1: bfc240ef3ffacbecebbc93de2e955cb25be40e30 SHA-256: 87a7fd3e763ae1ccb24f17c54f2433fc273ebb188c4edef911eb1aa445e172c5
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=leapfrog+letter+factory+dvd+walmart', which is likely used to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a social engineering attack.

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://kuzutuzo.ru/wix?keyword=leapfrog+letter+factory+dvd+walmart
    • http://keksik24.ru/neduvekabagababimome8rdio.pdf
    • http://nuverlites.online/how_to_write_a_linear_regression_reportujk8x.pdf
    • http://fisukebisogovi.22web.org/bathroom_sink_tap_parts_diagram.pdf
    • http://iciapp.xyz/how_do_you_get_hilton_rewardshxdu9.pdf
    • http://tefuvawilutir.mypressonline.com/how_much_is_a_wendys_6_piece_nugget.pdf
    • http://alcexpress1.xyz/dezemegojulelaz2h6j1.pdf
    • http://fopokigife.mywebcommunity.org/59772760819.pdf
    • http://gooddevice-online.com/fim_scale_cheat_sheetf0hy6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_d11f647c66214d6e8b39e757c68a895f.pdf?index=true
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_1d7316ba0dd345d9b1e84713ad14f014.pdf?index=true
    • https://s3.amazonaws.com/juzowilipi/rukorolelu.pdf
    • http://xonafalapon.epizy.com/21277330418.pdf
    • http://kemexulirejaror.rf.gd/what_happens_if_i_factory_reset_my_netgear_router.pdf
    • http://tafiwepamubov.atwebpages.com/what_is_an_example_of_a_bilateral_contract.pdf
    • http://fujukosis.epizy.com/43231095703.pdf
    • http://bezopiwuzalobit.rf.gd/apache_web_server_free_for_windows.pdf
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_3f018b30e1804859a9fc8750e4b34254.pdf?index=true
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_fca3a0433f30415c90d431a1f669d567.pdf?index=true
    • https://s3.amazonaws.com/wopari/android_game_development_course_hyderabad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcdf.bin
e924759e9d760ad21288c3137126273549037e892ca0b7fc0f2151d17880a73c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 5492 bytes
font_01_sfnt_off00010fa0.bin
569b89001f0dc155531284009a242b708e9813a15d1d700d1360f561d69a7d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA0 10900 bytes
font_02_sfnt_off000134f9.bin
73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.