Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af08ce32ed6b3b2…

MALICIOUS

PDF

93.8 KB Created: 2021-04-06 13:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2bd82ceb66a16d01193449b2b71691 SHA-1: 763bd13eed66ddaa550f5dc0e330bd194e62c0bc SHA-256: 6af08ce32ed6b3b2c74d992d8e941c2102545a6a088c801c38aea2a6f84d1610
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to educational content ('worksheet answers'). No scripts were extracted, but the presence of external URIs and the nature of the PDF heuristics suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=snurfle+meiosis+worksheet+answers+page+2
    • http://kofuxasapaduk.iblogger.org/informacion_de_el_arbol_ausubo.pdf
    • https://cdn.sqhk.co/pixazizaze/cqOjbs7/pokemon_master_ball_qr_code.pdf
    • http://zasijeg.iblogger.org/16532281046.pdf
    • http://4bochki.ru/the_pale_horse_agatha_christie_endingmmwwf.pdf
    • http://domsale.xyz/how_to_have_a_good_buzz_cutf1e60.pdf
    • http://umkatrade.ru/kifujidurixibokavixojg7054.pdf
    • https://cdn.sqhk.co/podiwilur/hamU4gg/99238839462.pdf
    • http://complerbnp.com/la_orestiada_analisiss14n4.pdf
    • http://depofukug.iblogger.org/51779355909.pdf
    • http://dkmz1.club/67497946524ire5o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/abc3d7c0-fe83-42bb-a1c3-e415a4cbd474/how_much_does_a_2020_porsche_macan_cost.pdf
    • http://dasiletu.epizy.com/technology_and_american_society_2nd_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/44de23c6-8abe-4c33-9276-bcbef2a83ce0/91452218540.pdf
    • https://uploads.strikinglycdn.com/files/d62df255-8d3a-4c0b-81f2-91648e1234a9/kitchenaid_ksm150_artisan_stand_mixer_-_almond_cream.pdf
    • https://uploads.strikinglycdn.com/files/0c9e78a9-dbbb-4b09-b42b-f5699c984da1/pioneer_vsx_1020_receiver_manual.pdf
    • https://uploads.strikinglycdn.com/files/9da872f5-71f3-41c7-91e3-7e42b84fe6eb/95884555984.pdf
    • http://tufirixanokeno.epizy.com/nivupagokupoxasowidapumuk.pdf
    • https://uploads.strikinglycdn.com/files/3f1beb7a-9e89-4e7c-80e7-8c8bb46c219e/87064270111.pdf
    • https://uploads.strikinglycdn.com/files/9345a99b-3ec7-4f04-be7d-800867c35d17/john_kotter_leading_change_1996.pdf
    • https://uploads.strikinglycdn.com/files/eb21dd86-2471-430f-a763-b2ff4d805300/convert_to_jpg_windows_7.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_off00010b07.bin
ad48c118cd72389ab788fa2a7ce097b3537048b91857f2e0f928a33094c8e257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 5708 bytes
font_01_sfnt_off00011e56.bin
0e67e800b25224dfd738975a8cbdbb5642857964ac5a2962366ba6bfc4043ceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 2860 bytes
font_02_sfnt_off00012a7f.bin
1e9e58e43e99e4484626616fd348f08602da14dd602a70906edcc677c92dc24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7F 11648 bytes
font_03_sfnt_off00015265.bin
afef7078cb2df19c3af6e0a290a1e91943695396d6c8eacc2b40ed28c0b27951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15265 16120 bytes

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