Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e50b5be0c82b64…

MALICIOUS

PDF

88.6 KB Created: 2021-06-29 21:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91c966f4b45dd472ceca91d166400583 SHA-1: b15a09f129a16184aeced62cabdb98f2c19bffa7 SHA-256: 33e50b5be0c82b64154462a3d96a3b89a898bc42f2a5e0abcbbfb807e538c85e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wastran.ru/uplcv?utm_term=meaning+of+squamous+epithelial+cells+in+urine
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/3eeb288f40853ffb3e3be07404849bd2/teluridesikakelirenini.pdf
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/pizexawokapoto.pdf
    • https://villanakarin.com/userfiles/files/badobavitisanowokinur.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091c10d24859---tuduxosuf.pdf
    • http://bkdesign.ee/userfiles/file/39465474060.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078034a60968---21053370049.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160809ccf1e76a---bozoxenorodapesepala.pdf
    • https://renebeumer.nl/userfiles/file/9337656114.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6abb676f2---1033367208.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b5d88e934---losovabife.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804e16435ff---luradudoxaxos.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b66ae55d0---dewupusujis.pdf
    • http://djpress.pl/Image/files/41411627731.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d211900d77---riduwolugatejibokerasij.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/4de186c749427d33003d0481c7022f03/bejefolipubawowemukupor.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099f61df08d7---88290683743.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b35162a42421454336ea6cb8dd844321/92244285900.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d61f3e7f0---samavajagomofopafenuzexe.pdf
    • https://vvpta-irvine.org/userfiles/file/zepokom.pdf
    • https://etonbio.com/newsLetters/images/file/zabexonu.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e1bb83c3f---83114716048.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/56f2780dc5babb85c3833e2ee90dd3a2/xomasudatelutozug.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/8e441e32a2203173a8bd5f2d1ef9ccab/19945578653.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60c0160ecd---85041689244.pdf
    • http://shiraz.sk/ckfinder/userfiles/files/38759498721.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://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_off0000f755.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 16792 bytes
font_01_sfnt_off00010f67.bin
2c955a7f8a0719c2257ae54b2cb6ab3efd9d58649e5243cef9728df8a33d2efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F67 16848 bytes
font_02_sfnt_off00013b17.bin
0e5b4d3ab67d89dd0196a1b2be2148f174b893e1c7e5eb07ae3a513dd83ca0cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B17 11168 bytes

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