Malicious PDF — malware analysis report

Static analysis result for SHA-256 07297e3cd6725222…

MALICIOUS

PDF

146.0 KB Created: 2021-07-31 02:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 61d4514a57d2af46004b1f4a536d8fc9 SHA-1: f3c7e3378b2c99a0796a838d493b50f37774c0be SHA-256: 07297e3cd6725222394e7e6689d6db9ffa0588ac9e3450ca17d752d529a35312
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://alhouti.com/userfiles/file/4810906231.pdf In PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a98d5f2cabc---gelijupekuvazeduzik.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-01-17-23-56-uUQEFH3F.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd3401ee48---pojawedeto.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ada753982---91836740059.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/53e252a2ff41ba56c8e892c305e4ab45/33208425479.pdfIn PDF document text
    • http://www.bash.cl/media/file/25082594330.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/9c6b926d87a59012879a23c9c2239d2a/bidagelapuporisen.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/84522119070.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffba811ae8---38376132382.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/topimawaxuwovipeto.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/gubavevoxorunusexedem.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d1adaae796b5d0b67fcf9d7f3701fdf9/25819385236.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff97dcd3a---badug.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/kbm8mfndrvrp7aj2o74oj8gkh8/61041881846.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/49141428153.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7dc072ae1e1a5ca8d56a115a2f0720d9/72664504745.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/0a7a433ac23b1c402f074bc3e8314ac0/riduzotodu.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/jubupaparajukalo.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089045547763---vonoxitara.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/faf5d65168decbe6324e5173df8c8316/12677095986.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/2559541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tamales+de+chipilin+que+sonPDF 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_off0001d481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D481 10788 bytes
SHA-256: 677160eb88caa9e685ed61905ec41ab2b91413658bf72ab9db0cd06a951b53c1
font_01_sfnt_off0001ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECDB 19808 bytes
SHA-256: efb3ce25bf6c7b51ee88bfe2cbc8468ddcbd409f3c0b2d640069f27ea5b93800
font_02_sfnt_off00021ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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