Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a30b29d72c065a…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 16:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50fcd0a16711e55fd60d1ecd0deeea06 SHA-1: 98495e1181921179554407e0878ffe6bb2ef8ad4 SHA-256: 13a30b29d72c065a4d494edc571db0b0717c9fc082a2eb81db333df5fd5e9139
96 Risk Score

Malware Insights

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

The file is a PDF that contains multiple embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure and embedded URIs are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=charge+of+the+goddess+valiente
    • http://modozadubop.mywebcommunity.org/16373376348.pdf
    • http://zaxegod.getenjoyment.net/27261275795.pdf
    • http://trudogoliya.online/79166031452m1jxa.pdf
    • http://widonatozeg.mypressonline.com/how_to_study_for_aphg_exam.pdf
    • http://eeuuurrrrr.space/what_is_an_organisms_role_in_an_ecosystemjswkq.pdf
    • http://rexuwoxaga.sportsontheweb.net/19454687203.pdf
    • http://lnstagramsupportinfo.com/kopekikanoximpqmk5.pdf
    • http://nuxipawuxodiwa.getenjoyment.net/38502821603.pdf
    • http://siteznakomstv69.space/warhammer_40000_inquisitor_martyr_crok9gq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://danetuxu.rf.gd/30056039554.pdf
    • https://s3.amazonaws.com/jezobasit/beethoven_movie_free.pdf
    • https://s3.amazonaws.com/zolerazowubow/how_to_practice_english_speaking_alone.pdf
    • http://gexijefepawu.epizy.com/21655620998.pdf
    • https://s3.amazonaws.com/vapelurowar/40691550731.pdf
    • http://zirutabu.myartsonline.com/63233398167.pdf
    • https://s3.amazonaws.com/sajezife/tavatowazagurilasa.pdf
    • https://s3.amazonaws.com/neviwove/laxedofojasejofoken.pdf
    • https://s3.amazonaws.com/rujimidujek/insinkerator_66_waste_disposal_unit.pdf
    • http://lojifasipok.rf.gd/in_christ_alone_piano_notes.pdf
    • https://s3.amazonaws.com/vuforewebub/licensed_clinical_social_worker_exam_study_guide.pdf
    • https://s3.amazonaws.com/wolawatin/gafokukofu.pdf
    • http://jaweratiz.atwebpages.com/rupitofesabiw.pdf
    • http://begujewirefe.myartsonline.com/vias_de_absorcion_de_farmacos.pdf
    • http://renowuvix.epizy.com/birthday_wallpaper_free_for_mobile.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_off0000f63b.bin
1f47d091c5fa08c91955a96847e4f98f205833af82978a764450d3ffa2890d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 5136 bytes
font_01_sfnt_off000107b5.bin
3a0fdd39ed4deb978078d4b5d6beb3cd062eb7229f7d37eee4adcdf8d3fd9ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 11700 bytes

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