Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ff9392fe1e3dc3…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 18:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c602d70ce7a1ee9748336c2b2aa7ec96 SHA-1: dd65b37d6511abedd8eb95fec30d342ad5d5727a SHA-256: 62ff9392fe1e3dc350ebe76c7d7600ef29a5b85ffcd9bee66045b8875953eddc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161364bc888fe9---96560300781.pdf In PDF document text
    • https://projektovanje.info/userfiles/file/penuzig.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/95104374370.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614118f452b08---girifiliperazesifoje.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/61997406644.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/21721961259.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/89353197914.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/32201072393.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/48174288669.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/65252857396.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/84107350816.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/jelere.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/jovabozovipemijejer.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/wotajuz.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/97749812634.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/9800789120.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/14195327888.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/56546737409.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/7526185719.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/tegadowimem.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/vuraxabofedulesuwidosaz.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bc0523176---57947370864.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/42886337853.pdfIn PDF document text
    • http://trubaopt.ru/content/file/92595210165.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/97570405650.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/ginegakokezamif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=connect+android+audio+to+pcPDF link annotation
    • 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_off0000da48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 19328 bytes
SHA-256: ab94d3061c8c257dbbc1a4195767841850e21ef9b81b9ef976d8dcb3ae77d3d6
font_01_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 10424 bytes
SHA-256: bd081ca605d4e6a6b90005e698f54e59c1e76b735fb4498dc11d7234d302b78a
font_02_sfnt_off0001232f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.