Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7c6040589d0113…

MALICIOUS

PDF

85.9 KB Created: 2021-06-28 16:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e380fd7a3fc73762f5344f899ba1555c SHA-1: 2b60d8b1a458037912782c6c0fca2aa3e8ef02c9 SHA-256: 0b7c6040589d0113d1e492df2b01f2d0a8e6713383373b723b871d33ad73fac3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS upload storage. The ML classifier and ClamAV also identified it as malicious. The document's structure and numerous external links suggest it is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074fd97a0bc2---sanamofawatoge.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f95eeb874bba39ad347740c5d735ac02/deposez.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ca977263---49875673624.pdf
    • http://bukharageorgia.com/sites/default/files/file/turijofexebebi.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa73321be---wokigileda.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/24e20f3ee46994a336c7cb1fde590383/95970470973.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a88639d1a0d---20584561665.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/27f47b3f34c573a90139917dc0fa44d2/vuxalikukamin.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64c263667---gekinigilid.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608603a3e30ac---lefixoxoxibogonulev.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a3e1616e809d44df3d42c43c3e5b942a/jumivilusigowozajafima.pdf
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/32785613333.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/riratokujetoxiwavuwilun.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ac7e4464---wetijarasodukinuneruded.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/quvgjhbf1m5gtugpma6vqppknn/jubopabuwiwekujirit.pdf
    • http://konemara.hu/userfiles/file/bogumekapi.pdf
    • http://auto-spec.ca/fck/file/86115960233.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a02204cfe---jutogamegevi.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr933r3luuv3jnurm2veqrdul1/lororaxire.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf33965ca9e---gigewegabetebef.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb86bb29f85---ninisalafuzusow.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/9gs9v0m2uhcv30q5lk3qmfqr00/80986073285.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28387d44---6271136157.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/634e76f1aba6d8f027b4409739691055/12379549028.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clash+of+clans+ipa+hack
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf0.bin
3768b69b85000656911ea68abc61c5871014cf608dda555f03d3bbc61b98cd88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 17244 bytes
font_01_sfnt_off00011b1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 16792 bytes
font_02_sfnt_off00013336.bin
fbfca63eb1dd7e16f4a9cfec88fe342c5d4d5812a5a629b811cb7d1bb126b65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13336 10372 bytes

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