Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8c39fe40565861…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 05:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 56c1f8e889034829e995e6082df47584 SHA-1: 9f22e57cd0f09e8fdc98202fb85cf34e39519fe5 SHA-256: 3f8c39fe4056586141043262d9ead19ee0b0c49e34200445f5fab8bb71134296
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a phishing site disguised as a 'good cause letter example'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=ccw+good+cause+letter+example PDF link annotation
    • https://cdn.sqhk.co/numavagoko/phaAhjH/music_player_software_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/egjt5gc/knives_for_sale_near_me.pdfIn PDF document text
    • http://cmbclientes.com/xurawusetivafawafuf01b09.pdfIn PDF document text
    • https://cdn.sqhk.co/ninafoso/ghbJiij/war_robots_hack_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/XTidX9y/51435030143.pdfIn PDF document text
    • http://gatorama.fun/rilafox9ne6i.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ghbjh2R/dolojubidosoxum.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/gg2ImHf/57975137356.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/59648246110pw6s9.pdfIn PDF document text
    • http://yesnutural.space/readymade_mba_projects_free_downloadinoif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/limepusotanal/bearing_size_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/lewin.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/vimepu.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/67327750692.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/biharmasti_in_south_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/44488258856.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/gugaxoli.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/list_of_classroom_management_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/28228845952.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/guwos.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/action_plan_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/jabariya_jodi_full_hd_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5304 bytes
SHA-256: 688875ae4e243bc47d836aee161501275e23088f94bd0f0652b04da181f4d0ad
font_01_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 10056 bytes
SHA-256: d2585cceb604af8fe04d5f449a1124fb31674ec1f2c77ee87a1d680174e1406b
font_02_sfnt_off00011712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11712 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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