Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda823fd22d9256…

MALICIOUS

PDF

82.3 KB Created: 2021-08-27 20:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 09a38f34d83765d5a0b2a08223795622 SHA-1: 1fab03d9ab4b20e063970df2bce7d2ae67aeaf78 SHA-256: 1eda823fd22d92563f45b9bad687a34770e6f77396eeffaf59e27f284d176266
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to further malicious content or phishing pages. No scripts were extracted, but the overall structure and URL analysis point to a phishing campaign.

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 https://irlanc.ru/uplcv?utm_term=how+to+calculate+the+number+of+neutrons+in+an+atom PDF link annotation
    • https://cfbadalona.net/ckdata/files/29082373135.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/8404017709.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/zogutepemumixebexure.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/danaxedebevifeja.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/99713312271.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/somijasiravatofise.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6fbe10aae---vagememotitexob.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1cff6b8044eea8ef9cec911cc6ece2ea/28506960574.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0ba83de1e4---zabuniwegexopidu.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/36898c84560c2f3a60bd1a7f7f05ebfd/sifatolepapigepi.pdfIn PDF document text
    • http://iccarrentals.com/files/file/dojuxesuzokot.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/bcb0b9cf79b36aadd193b3c660aaf7cf/tuzikaj.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/85034239237.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0c06dd4390f819eda9536330a8ac94fe/kojikidiz.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/73254477075.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/582465443013dae5a8c8597f8d8b9b21.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89256720443.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754172539da---595537857.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/160282945d3809cdf6f7f56fcd4b60cd/xipuguzuzagomekezipexu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ce73b19b11e---siziluvub.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/2b591e64e78e684f551d0d2c55a23efc/zodalenogidajikonuketuxo.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae530922c68---kemegekebureluzuxowolok.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/41aed388ad1634366161b4a2c5b20bdb/51809182587.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b10edb0f82---sigovaruf.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/wunex.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/nubosasizuzupitunaz.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_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 17608 bytes
SHA-256: 763f9fcfa46bffec6390f85e6eae4a9b1bbcc832ee9a0adb7260d8419f2bb052
font_02_sfnt_off000121ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EA 10916 bytes
SHA-256: 4067d8d87c27507f8a414ffdc127c2acfd7079c22a7be6c45838678d07929987

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