Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc26830fdc5073b9…

MALICIOUS

PDF

83.4 KB Created: 2021-06-07 11:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe17b19380fe22642bef77d09e74f94 SHA-1: 12768643e3debba997f07f9137da4f64c0d05106 SHA-256: cc26830fdc5073b9b22aff7953020a350eebae365c66d24ce0ffc1c52c5f129c
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 a suspicious domain, which is likely the primary lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://oniceh.ru/pbw?utm_term=super+smash+bros+ultimate+dlc+character+leak
    • https://static.s123-cdn-static.com/uploads/4491175/normal_5ff719b3e488c.pdf
    • https://cdn-cms.f-static.net/uploads/4465000/normal_601208dca2421.pdf
    • https://cdn-cms.f-static.net/uploads/4384030/normal_603c78a44ef42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zuwofig.pbworks.com/w/file/fetch/144543108/49266764545.pdf
    • http://mikabipi.pbworks.com/f/asterix_and_obelix_chariot_race.pdf
    • https://uploads.strikinglycdn.com/files/05ad62e7-15d7-465c-9dbc-96b5b70d7ab2/ge_advantium_microwave_stopped_working.pdf
    • https://uploads.strikinglycdn.com/files/875be09c-4399-40ac-99bb-858e8b78b414/roblox_pokemon_brick_bronze_randomizer_2020.pdf
    • http://bujolajoxek.pbworks.com/w/file/fetch/144529971/what_is_e8_error_in_ac.pdf
    • https://uploads.strikinglycdn.com/files/8a7ac532-1cf1-4329-ac87-c5c54c482879/58523706467.pdf
    • http://redelaw.pbworks.com/f/what_does_444_mean_in_a_relationship.pdf
    • https://uploads.strikinglycdn.com/files/f83d7d2a-0f9e-4873-9274-f68eba728262/17429653781.pdf
    • https://uploads.strikinglycdn.com/files/af441ecd-e607-4e7f-a1e4-7898f890c064/fabubaronasi.pdf
    • http://gemometis.pbworks.com/w/file/fetch/144511728/hop_ball_3d_pc.pdf
    • http://wevapejatu.pbworks.com/f/naguxidupivogumiviwes.pdf
    • https://uploads.strikinglycdn.com/files/7e406082-e9d8-4383-b90f-280b78793f5b/como_checar_si_un_imei_esta_reportado.pdf
    • https://uploads.strikinglycdn.com/files/06ed317e-a9c0-4e7c-904a-5244cd26eec3/windows_xp_bootable_usb_tool_free_download.pdf
    • http://xalomuzavege.pbworks.com/f/cuanto_tiempo_tarda_el_papel_higienico_en_degradarse.pdf
    • https://uploads.strikinglycdn.com/files/774dfa3c-cf44-4abe-810a-80e9c4afe1ba/vudonexigibixemolonivisu.pdf
    • http://wijozuzapusa.pbworks.com/f/72401077572.pdf
    • https://uploads.strikinglycdn.com/files/f9a116fb-e197-4564-bc2b-e25798e94cff/c_yellow_book_2019.pdf
    • https://uploads.strikinglycdn.com/files/4959e3d6-ee44-4b46-8741-c237f7419fb2/tinurejujimedumuzejenoz.pdf
    • http://detomipipu.pbworks.com/w/file/fetch/144518145/wurow.pdf
    • https://uploads.strikinglycdn.com/files/7f77efc8-dba7-4062-ba4d-87c133b053f3/varopisurogisizutoraposaj.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_off0000f046.bin
75c9e849e2c528ed3a9d1eddde613f978b74f650e2e50e0820b38e5c78515be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 5620 bytes
font_01_sfnt_off0001032a.bin
12bb190187858bc642906e5de0b87300f370e13a1c315d63ed7e7d44718f0c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 11320 bytes
font_02_sfnt_off000129ef.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129EF 16312 bytes

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