Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae1762ceeb49550…

MALICIOUS

PDF

151.9 KB Created: 2021-03-18 15:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de1a26f9c7fba72022a4f4b86560b244 SHA-1: 2fbd5616bb04bc245a8ee578a8f002143e5fddec SHA-256: aae1762ceeb49550d5c14ef0b36ff5a5f00a58e1c1baa407737358b9c1ee9cae
96 Risk Score

Malware Insights

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

The file is a PDF containing an external URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, contains keywords related to graphics cards, suggesting a lure for phishing or malware delivery. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://resalured.ru/award?keyword=nvidia+graphics+card+list+pdf
    • http://lutefadeba.scienceontheweb.net/dumozamopedarolago.pdf
    • https://cdn.sqhk.co/pazaxefuma/jvkBhdG/wepimor.pdf
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdf
    • https://cdn.sqhk.co/jerivudofin/0Fjdhgu/dokoxabubokasig.pdf
    • https://cdn.sqhk.co/kurotevu/OghifhA/shark_attack_vr_game.pdf
    • http://larebalin.mypressonline.com/vipulebujemab.pdf
    • http://tesugujinarijag.mywebcommunity.org/oral_medication_administration_procedure.pdf
    • https://cdn.sqhk.co/nuvexajamu/1hht8id/23152017888.pdf
    • https://cdn.sqhk.co/wogokodu/jchbgd7/uc_browser_mini_vs_turbo.pdf
    • https://cdn.sqhk.co/badilapo/ie8ifEP/cinemark_iguatemi_brasilia_filmes.pdf
    • https://cdn.sqhk.co/lewoxiguj/ji5Xjc2/54997821687.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_8d52045520e943138fe4cf96fb990293.pdf?index=true
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_9edde879086340ae8ede3e64053fb8ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8d34b17e-d4a4-4fe9-be1d-88a585f85a3c/how_to_use_comforday_handheld_steam_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/870574e4-533b-48b4-ac2a-0d0dfaf144e2/6.5_grendel_load_data_hodgdon.pdf
    • https://uploads.strikinglycdn.com/files/7673eab4-8a25-4dff-8904-2a04711c75f6/percy_jackson_book_6_name.pdf
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_2ad345a68f404092a9d6b39081cbaa2a.pdf?index=true
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_3cbfc4641a9e4b98a2a7508d3e09f347.pdf?index=true
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_71e508f01b73402fa364b3e797fa20dc.pdf?index=true
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_9f405be22d00415db274b094b05ba4df.pdf?index=true
    • https://uploads.strikinglycdn.com/files/155d9997-6785-41a2-bddc-e74a497bef7b/ob_nursing_final_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/f13171d7-fe70-481c-af4b-c1c3ca98bd89/first_break_all_the_rules_audiobook.pdf
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_e90e540d91a34bb8b744bdc2eb8f615a.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff73.bin
a674d1580719e5d68b5658d802f84accfa86caf584a5b6e3e93384a84cd7abe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF73 5444 bytes
font_01_sfnt_off00021205.bin
7fe18d5f20b523be561598feb781aa3e3ed3e6f93057cb3e235ff8f8f71f9929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21205 12304 bytes
font_02_sfnt_off00023c48.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C48 16060 bytes

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