Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e12d10d63ea052…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 20:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 05ee45d3b3e9555fda43f8f6bb3eb1bf SHA-1: a3d91c52e04d2b8fff6cebadaa7a7e5dcc11537b SHA-256: 07e12d10d63ea0521890075bae494e22e92cc1ea071e980f61b317ebe3d9a140
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=valores+infrahumanos+pdf PDF link annotation
    • http://sun-green.de/ckfinder/userfiles/files/77633307012.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nobeflsi3n7scovii9sq2veis3/foluxerezuzoxenatulosixu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058a915d4d---60889457161.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/21265905995.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/kobobotun.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/11361971291.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/jutoxidabibivixexovazumaw.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/43438a8a3c242340459ad34196192df7/jofamokedeseg.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/jizabupegafafonisupiti.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f85ab43289---75254669698.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/8a5f7b69b60ad02331bca35121271da5/6251285234.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/lerosubifufuxitiwagatovev.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093228c28886---vulebiv.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/momofamalebe.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/wirovabafe.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16087495e91b38---fotawiduvatuvivi.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/gumilege.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74de0a86a---xoromemodup.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/xitebojopujodo.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/3uiaog38ivnl1eeubuo9k0u8dd/jadaw.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/gokefizi.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/92519202813.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/wemuvi.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/8183799194.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/d2f058addd57f30ff457cdcb0ab726f4/pebasuvuzeguvunifijin.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 20820 bytes
SHA-256: 5a48c8d652daf0e8e3342de30479c93c31fa94f1d1a1a1a30cb5b67d2ab3b1ca
font_01_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 10732 bytes
SHA-256: b912d60035241e1901567775a2a89ea5adbdac7dc0bab3be1ac647313c478db6
font_02_sfnt_off000127ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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