Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecc32195e8c1f8c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-04 15:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a1821c3724e596d0c4c18260a14d8a73 SHA-1: eaeb291e7237e9cc84fdf098a52fdfd0bdafdf7f SHA-256: aecc32195e8c1f8c832b0773a9d7aed5a51a79eb117e2ba932de5ecd3fee60d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the presence of numerous external links indicates an effort to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/631120027358ae522ca93459f3c6766a/82815131642.pdf In PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9605b5f50---desisefozuzogokej.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c4177619cdf4bcb635e0c0591b6fe1ec/12142597482.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/97551067184.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/40059129262.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609406ccc724e---monewunozibu.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/49c8bd69c540b8a48ea77e59daa8a551/toxepisidivejobufegesudi.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/89911142837.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/nenadapalupekofususepu.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/9017419363.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/mopovosikosetafewek.pdfIn PDF document text
    • https://ivaco.it/file/sufasinipusenev.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/20e7103d65fd53d6e0a0101dcc1c353d/97342168671.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/56896642944.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/14343052328.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/xapaladelamovewopavawog.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/44648884378.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/11812421083.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc06b2e474---83987415627.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/fipele.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/53664843513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2002+toyota+sienna+repair+manual+pdfPDF 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_off0000d005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD005 16680 bytes
SHA-256: 6bb7432bc5a3e4be987d2e5bd6ca51eb80fbe5aefffcef95fe81e805652926b6
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 11016 bytes
SHA-256: 34ff0c618396031d571acdc82111c7b5fa85ad15566ad31f5d3eae12287cfb37