Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe066549b78247b…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 09:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb31996c142eb5b3c043483cf7587093 SHA-1: d55cd8ba43c30a1ab27d288f3076f854782ea7cb SHA-256: 8fe066549b78247bfe852b8d69db68aa42cd5246df23248478c85eceb27862d1
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a search result for a book. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://golowaki.ru/wix?keyword=charlie+munger+the+complete+investor+book+pdf, is likely used to redirect the user to a malicious site or download further malware. No scripts were extracted, but the PDF structure and external URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=charlie+munger+the+complete+investor+book+pdf
    • https://static.s123-cdn-static.com/uploads/4464315/normal_5ff58259bb3ed.pdf
    • http://netewe5.xyz/25817533016wi0t6.pdf
    • http://xunopapazugatar.medianewsonline.com/tufuveduwaninet.pdf
    • http://gouliwer.online/rawinotugoxbt5t.pdf
    • http://interbankdigital.com/70121519772zjnaj.pdf
    • http://bowuvudofi.scienceontheweb.net/arris_tm822_manual.pdf
    • http://reduslim-italia.website/tudexdrd6g.pdf
    • http://pazifelurup.medianewsonline.com/korean_grammar_in_use_workbook.pdf
    • http://fakexexu.sportsontheweb.net/wilerolevawipivuxulaguz.pdf
    • https://cdn-cms.f-static.net/uploads/4455902/normal_601bfd58e0f0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5efb14b5-becc-4c0a-ac4b-153d38839e73/relol.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/vafemawakowarerevumase.pdf
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_29eae605554b466e87109b1a74b1cc58.pdf?index=true
    • https://uploads.strikinglycdn.com/files/86fb4cc8-edc6-4c1e-8117-897402c231f2/kirogalutomawepo.pdf
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_eb760e96980e47a2861ab2d6a3bd905e.pdf?index=true
    • https://s3.amazonaws.com/dejolavubukugeb/the_great_debaters_viewing_guide_day_1.pdf
    • https://uploads.strikinglycdn.com/files/1484015e-5d36-44fa-b9f3-f5d631726048/kupopuk.pdf
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_b6db525cb03a4b21900c62145c00ff61.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2810d9c4-d6ea-4ae9-86b0-cbf0644e782d/is_data_science_all_about_coding.pdf
    • https://s3.amazonaws.com/galinikagopit/17376704984.pdf
    • 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_off0000f805.bin
cdf532054e42a81253a4c3adb0186ffe58d53f41431099e67f10938ebaca2645		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 5736 bytes
font_01_sfnt_off00010b67.bin
bda2e50eea4818351d237dcc43efc9d452ce5499c99f83d7980856398910dd66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B67 11820 bytes

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