Malicious PDF — malware analysis report

Static analysis result for SHA-256 d011ae02423a5ae0…

MALICIOUS

PDF

85.6 KB Created: 2021-07-07 13:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5833142dde4b68e292da97c6a69f11d1 SHA-1: 03f17121b27fb629789eb8e60e1c337c3b7594c1 SHA-256: d011ae02423a5ae064de297bf4a178932bb27a23b3a44a92e983ab661a30566a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate that the PDF contains numerous links pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of these links suggests an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

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 http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4t24f5g54r4k2cs9u6do43rbq2/nuxugebusuv.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfb7367f58---ruwenodevawawo.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/g7ng9dempdrek6q4nhl7ovb44d/68323264129.pdf
    • http://email-database.info/userfiles/file/81154512524.pdf
    • http://synthecinter.com/userfiles/files/77631999188.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e65b409ef---kuzageferepiwisuw.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/05738b52569d70a2acc535d5e57b57cb/wagumevivokogijepufal.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cc8dc35b2b8bf1e418026ca29346c8e0/99176599485.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f8b0361e0---fojirop.pdf
    • http://asiadomainstore.com/userfiles/file/xekubo.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1ea9efc97a65541dd80d908548cfa551/vamamevipadafowul.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ias4qs3dm6mdlufqjgib75kl21/fovaxapumu.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c24f01d72b6---93387734922.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dcf71680a---mipikivabimogaxal.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f6dd83bd7---44102896777.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/91370e98479d03800bbdb9dcd7c83a83/2928942785.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/89jfl7g2k2qcak6hqc494jq2h2/34341211624.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/692221cf90e7aa9636348e1e3200ff06/rofanekumuz.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9879cc352d3d67c0f6059a40556419dd/vodaposefisozubuge.pdf
    • http://bluekeydigital.com/images/pic/file/20989721882.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/fc6f6723cc68528d0ce4af08e5eb633d/runat.pdf
    • http://technoculture.cz/admin/upload/file/sezaju.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/9j02jgchietc03eut8au2g8vkb/kiwezamoboxutexavarefi.pdf
    • http://dream-mebel.com/pic/file/73747794786.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4a9c4c01ec3db824bb9116de8dcea7f7/81759301965.pdf
    • https://mariellatriolo.it/public/file/dafurerasugorebogusavaju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=meaning+of+characterless
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000be4f.bin
e308f1b6142f68453d11570b363d430682aa89808be8d346220082e02be05ff1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBE4F 16868 bytes
font_01_sfnt_off0000d6c9.bin
e9fa3be7ab2097415593a565c7ac1ff6ee57979294dd78cb2a289023203326b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C9 21808 bytes
font_02_sfnt_off00010a31.bin
396d59946b5edff0ed2148450bc072eae0180828cb0a7afe0fcd40501c56b5ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 2828 bytes
font_03_sfnt_off00011621.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11621 16792 bytes
font_04_sfnt_off00012e38.bin
e52c49c4bd09e4b5db61e7422ea026df7426e1dd732c42035121ff2464bbceba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E38 10608 bytes

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