Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f79a8d6f9168e30…

MALICIOUS

PDF

85.2 KB Created: 2021-03-22 00:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4aac5ca10c60e445aceff9c21e6b9617 SHA-1: 8c6e67048fe700f86a4cd07cd76d0ea10de106a3 SHA-256: 5f79a8d6f9168e301723f491330e94144dede40b58163e4bff96dcc90299e7b7
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The PDF structure also indicates potential malicious intent, as evidenced by duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/wix?keyword=infinite+improbability+drive+tea PDF link annotation
    • http://nijepatexosanus.medianewsonline.com/nobakaxexu.pdfIn PDF document text
    • http://peteferix.mypressonline.com/business_english_role_plays_dialogues.pdfIn PDF document text
    • http://xufisuraber.22web.org/how_to_install_water_filter_on_kitchenaid_refrigerator.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/cardio_gym_workout_plan_for_beginners.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/xonefawiti.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/maze_runner_3_full_movie_123movies.pdfIn PDF document text
    • http://javoreruja.iblogger.org/warranty_vs_performance_guarantee.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/vobotexunovivipobagege.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://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_258cef1d45e04cb88fc022d15eb1cf4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vokeri/mawaxexazukawe.pdfIn PDF document text
    • http://ponadik.epizy.com/how_to_make_iced_matcha_latte_dunkin_donuts.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/3155304088.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/fimijawik.pdfIn PDF document text
    • http://jonesojawu.myartsonline.com/modern_sociological_theories.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/enfermedad_hemoltica_del_recin_nacido_por_incompatibilidad_abo.pdfIn PDF document text
    • https://37b1cabf-41b6-4e27-befa-0fe7335ed416.filesusr.com/ugd/9d05b5_2bae825e0ab04b5cb1bd976b806cc98e.pdf?index=trueIn PDF document text
    • http://jexukavelewin.rf.gd/81041549325.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_dc37e5c0ca494d128f404b4bf5bf054e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/ashby_school_sixth_form_induction.pdfIn PDF document text
    • http://suvowafavij.epizy.com/conjugate_acid_base_pairs_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/sijuninefuwagalewemul.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/82202202603.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_cff685818eee4d538e5449e546bbb4bb.pdf?index=trueIn PDF document text
    • http://bogalibamadom.myartsonline.com/42473420886.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_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 5036 bytes
SHA-256: 3a6944b85939a6643e780b0fe0c28e83c45519b23a2decb94ffe0c711becfe63
font_01_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 11164 bytes
SHA-256: 617f3f2b60e453a0aee1cb44e798512d6edec91569bc4c966e35d3a7b9339ade
font_02_sfnt_off000138fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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