Malicious PDF — malware analysis report

Static analysis result for SHA-256 5270cd44d64c81c8…

MALICIOUS

PDF

77.2 KB Created: 2021-03-19 12:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dfaf4c3802079900e69fc9ae7a582371 SHA-1: 1708114eaf96fcf51edc5211d4f96166526b85e4 SHA-256: 5270cd44d64c81c8e1a540f4273c211319ea6fba7fae033037b4009aa506b7c8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to various potentially malicious sites. The embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign. The document body, though partially corrupted, contains keywords related to financial statements, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=estado+de+ganancia+y+perdida+definicion PDF link annotation
    • http://helpcenter.business/592488581677c9sd.pdfIn PDF document text
    • http://svoydvalend.xyz/concierto_de_aranjuez_piano_sheet_musiczg4dn.pdfIn PDF document text
    • http://tricitysikhs.com/855650486762iqvz.pdfIn PDF document text
    • http://daimontimur.org/19307679209q6jpx.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/dihjhha/xezebazolitijobalewidojo.pdfIn PDF document text
    • http://kirivil.iblogger.org/dsc_pk5500_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ihYihD3/neposazagazudovulul.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/Sjagcja/24691815070.pdfIn PDF document text
    • http://wimixolumow.iblogger.org/beeston_train_station_platforms.pdfIn PDF document text
    • http://xovasaf.iblogger.org/76356606955.pdfIn PDF document text
    • http://tesekitogibop.22web.org/descendants_2_you_and_me_song.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/mexesazaxasa/lirupusokuroxepa.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_0545c01663994cadba5c33e2edc1ed11.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_8648819584664603aefe1de69086f779.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/ketovaludes.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/indefinite_admittance_matrix.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/vazalunobamipemepuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/butujuburixugarorofefi.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/hamilton_beach_xl_convection_oven_with_rotisserie_model_31108.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/find_area_of_equilateral_triangle_inscribed_in_circle.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_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 5348 bytes
SHA-256: 04558ef9de3589fd3f8bdde35eec5cfdcc77c94691b31dc91a37a5c12c5417fb
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 11664 bytes
SHA-256: 68a451f93d4bd7915e462d62a3847c517ce32d31486f294e2989eac16b3fdb09

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