Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c22babad20e1b7…

MALICIOUS

PDF

72.4 KB Created: 2021-03-30 08:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eb50cd79947c937d42d714fe6aa92cb6 SHA-1: 059fef223c96783e6d332e2d1a3bccf1885519d1 SHA-256: 33c22babad20e1b7e41571dc7a2f820997323a6364b31c858cd0423ed54aae81
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. ClamAV and an ML classifier flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. The presence of external URIs and the overall detection by security tools strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/wix?keyword=dsp+first+2nd+edition+solutions+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454679/normal_600202d826302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fc99931a97e4.pdfIn PDF document text
    • http://uplrezina.site/3847599793719h8f.pdfIn PDF document text
    • http://keepqifi.space/can_i_get_adobe_acrobat_freea62wz.pdfIn PDF document text
    • http://usesoda.pro/13963900994h223.pdfIn PDF document text
    • http://reactivascotia2020.com/xewuwujofcehd.pdfIn PDF document text
    • http://samettemiz.xyz/is_there_a_walmart_open_on_christmas_dayzugwx.pdfIn PDF document text
    • http://premiumpornclips.com/vezafera6xyg.pdfIn PDF document text
    • http://runmasten.online/law_of_torts_and_easement_meaning_in_urdug9ts9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_600b24fa63809.pdfIn PDF document text
    • http://smartradiobf.ru/dark_souls_remastered_guide_lobos6l97x.pdfIn PDF document text
    • http://palitra-cveta.ru/fitbit_charge_4_sale_ukmwcrc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470703/normal_5fd08b8de7344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezutu/4475324534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1ce27a-8f8c-459f-8cd9-46792a31e3d3/descargar_libro_finanzas_personales_para_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8444753d-da50-4fe4-8a3b-1c9838655797/senanawuzazefafawolifimuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952740c7-0139-4de2-8aa2-5927e9e0f75c/73824335110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54a2962-80cc-4359-b12b-b9f3130e1f2c/around_the_world_in_80_days_summary_by_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/company_of_heroes_trainer_1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/27640346955.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/what_does_dl_mean_on_a_kenmore_elite_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/tidaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/89983999060.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/fevox.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_off0000db87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB87 4956 bytes
SHA-256: 5023f8e5b1baca0de75bcaf070d969703e53db4b630d435a253996fb907ee0c5
font_01_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 11128 bytes
SHA-256: 24bf6e70320d00280ada0643d393b65e79cd99310108b09e561155b8b82c5af0

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