Malicious PDF — malware analysis report

Static analysis result for SHA-256 4109650d8ac70f22…

MALICIOUS

PDF

98.7 KB Created: 2021-03-20 23:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cceb78b8f09dff4511006222f8ca5a34 SHA-1: b8adba8d45639681e8e1ff38c770c33ff4b83cb4 SHA-256: 4109650d8ac70f2245944e51accf843e2fb7b4836a8a269775de7e46c2974e7f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent. The embedded URL is likely intended to download a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/wix?keyword=silence+of+the+lambs+summary+sparknotes
    • https://static.s123-cdn-static.com/uploads/4459188/normal_5fdd4af9236c3.pdf
    • http://arm-watch3.club/mosotelenuzupaxuklsr6y.pdf
    • http://tixaman.scienceontheweb.net/84634257412.pdf
    • https://static.s123-cdn-static.com/uploads/4485698/normal_5fec1fdd988c1.pdf
    • http://gukiduwonaxinef.getenjoyment.net/blank_periodic_table_of_first_20_elements.pdf
    • http://keepxufi.space/china_kung_fu_master_picture95p1f.pdf
    • http://hangzhoumetal.ru/washington_redskins_stats_this_year7ri5p.pdf
    • http://jebuzakawug.iblogger.org/asphalt_institute_method_of_flexible_pavement_design.pdf
    • http://newsportstechnology.ru/443779388062cn00.pdf
    • https://cdn-cms.f-static.net/uploads/4377408/normal_601b86dd5ff98.pdf
    • http://tekplafond.xyz/how_to_update_nexus_10_manually5k3nw.pdf
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5ff37f2caa443.pdf
    • https://cdn-cms.f-static.net/uploads/4446765/normal_600bc4c7ea52c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_b5a060e5a5694759b9faf2dff333e376.pdf?index=true
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_644839216c684520a49ed3ebf10a906d.pdf?index=true
    • http://bedipowatukefov.epizy.com/kitchenaid_pro_600_series_6_quart_bowl-lift_stand_mixer_in_white_kp26m1xwh.pdf
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_85e31fad7800454a9fada9fab61367a8.pdf?index=true
    • https://s3.amazonaws.com/pisik/vidmate_hd_music_and_video_er.pdf
    • http://xamupufe.epizy.com/how_to_reinstall_audio_output_device_windows_10.pdf
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_005d7904351740dfb9f9fd521fbdb5b8.pdf?index=true
    • https://s3.amazonaws.com/masevewi/ram_cichlid_care_sheet.pdf
    • https://s3.amazonaws.com/norozovijalu/2005_yamaha_r6_service_manual.pdf
    • https://s3.amazonaws.com/tezude/91734773119.pdf
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_d43ba2d875ec4231b021438b60f6f031.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014343.bin
d4872b681ccb309047e56d9daa1c251f88799d3c938868f6b0621f5a9d1736bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14343 5664 bytes
font_01_sfnt_off00015662.bin
478c39779ea0ea67d7127c6ab9f7146725a03311da863d67b895ea6b77668d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15662 11332 bytes

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