Malicious PDF — malware analysis report

Static analysis result for SHA-256 a161cc8f08037a38…

MALICIOUS

PDF

267.7 KB Created: 2021-04-02 11:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54adecaaf2207348bcf93aa90db93221 SHA-1: 70f39baad15eabedd1cc910488723e2852daa272 SHA-256: a161cc8f08037a38322325d184fdf89c336828cbf530988d7d22086eb6c66960
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://seumenha.ru/123?utm_term=joint+defence+agreement+template PDF link annotation
    • https://cdn.sqhk.co/talokelom/3ifjiEK/6393805495.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/uB6o2ia/lopisedopiramo.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/2hrgf3v/bumijibaxuxedozevajureliz.pdfIn PDF document text
    • https://cdn.sqhk.co/sozetojedisu/Kmjdjhd/97709851174.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/i211zgg/vurabomo.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/kMB25hi/komavifatixijipepekinulol.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/hejjifU/16500089016.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/iwgcoih/action_launcher_pixel_edition_plus_apk_43.pdfIn PDF document text
    • https://cdn.sqhk.co/bawijodol/ybgeghu/racing_in_car_traffic_driver_ski_accident.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/f26b624c-3328-4e21-8889-e0c77c060b38/how_much_does_a_50cc_moped_mot_cost.pdfIn PDF document text
    • https://66f9544f-8325-470d-a543-c07714603334.filesusr.com/ugd/4b2642_466d5012694a4e2aa4d3f852b4c11a0a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a69aa27-ad0e-4c0d-9d7e-7caad7512b1e/badorumi.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_9dc8895868634aba8128089bc45a1da9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b7a1d9-05dd-4d31-be60-015a7057fcb9/zejixulalifigupunulato.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_e37fcd70080f4809b1dc0112f8a99f2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fbb0e8-77e7-41b9-af74-ea76d795e0db/como_convertir_pulgadas_a_milimetros_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fec0ba-ef8d-48c6-a4b0-8e53d34c30ec/71812167526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a05158-1f5a-49ac-9604-a6d6f73bc0b1/are_apple_books_drm_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7122e1-be32-4e62-b2b6-007ba468f970/romeo_and_juliet_act_3_scene_2_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe42ed49-1275-47c3-8bcf-b64f5636c24b/fl_studio_11_producer_edition_tutorial.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_off0003d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D70C 5284 bytes
SHA-256: de3cb1e5855d1cc10a083bc936f2e7f3e55aa23e1e4881155cfd1d4094cd351c
font_01_sfnt_off0003e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E8F6 19448 bytes
SHA-256: f6c635cf2f298c87268d00566ab87a46df129b40ce66579ed49c65506ddf65e7

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