Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f90fb5dc451ace…

MALICIOUS

PDF

76.0 KB Created: 2021-03-06 12:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c470febfc753014657086f1893673e92 SHA-1: 1a9baa71c4072cb1212e302ce3dbbe0c380ad8f0 SHA-256: f2f90fb5dc451acea34ab6dff82cb12710fe32b81a61c816c7e7cde0d7d14b75
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a product manual, directing users to a suspicious URL. No scripts were extracted, but the presence of an external URI points to a phishing or redirection attempt.

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://xajibur.ru/wix?keyword=aptx+bluetooth+headset+manual PDF link annotation
    • http://gnoogle.site/fibujibazebekusisoforhugw.pdfIn PDF document text
    • http://teren.fun/prodigy_level_100_hack0q5p2.pdfIn PDF document text
    • http://flylovel.com/polo_ralph_lauren_coupons_2020fqcxx.pdfIn PDF document text
    • http://monoga.space/bimibotamopodanabixesujifixiii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2ff44c-d98f-46ae-850f-2508b468c4f3/netgear_n600_dsl_modem_router_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b7208a-63f4-4f5c-ac8f-4a2fe32b9ef0/39689307486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccd7aa6-5134-4eee-98a4-75059261aaf2/21450678048.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/72697033715.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/auto_tap_android_no_root_no_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daac923d-fa68-4d6e-b9de-3ec526e4c071/flight_sim_x_helicopter_controls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab06789-5d10-432e-b865-b64a72a3a672/how_to_draw_a_boy_for_beginners_step_by_step_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/651956101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b9523e-c097-4eee-a3b0-81eadaec79de/samsad_bengali_to_english_dictionary_free_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c46a35-4f71-474c-a8b9-f765c4ba7417/spektrum_dx7s_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f8008b-4b2d-4a98-b649-ca513ad35e0e/us_history_chapter_19_section_4_the_other_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f142c4-6883-4173-9ab0-9f6a9bacdf13/somegisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3174b88-e954-49fa-ae5b-dc1fec9d5a81/8509852551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bb7dba-dbae-4b89-90e3-c7ac1d628b87/31048243461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fcbcae-8320-4353-bb0a-2c87b48d614a/harrison_bergeron_kurt_vonnegut_jr_summary.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 5300 bytes
SHA-256: 609137fd7c0e5483deb3f6cb19edf463e7c42f09992edf0f74146f9efccfd056
font_01_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 11232 bytes
SHA-256: 927c95ed5857389e86ab3340a704239ad7bd115f9900cc8f7d05711fafe152aa

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