Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c53742872d252b…

MALICIOUS

PDF

98.5 KB Created: 2021-06-27 04:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fd7650e032b56f99546086cc9821ec02 SHA-1: 582556e72491cdd44c94d3fd35a144c4313555c9 SHA-256: 32c53742872d252ba62af04cf5f651948c39952dd56ef889777aefed4d25f145
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The presence of a 'kms activator word 2016' URL suggests a phishing or software piracy lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://crewmak.ru/uplcv?utm_term=kms+activator+word+2016 PDF link annotation
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/k7hgtej0r2c6n52oul3lgp9od1/lupitip.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3nkqjcfvao1r00i9v11inbtb0k/75796410695.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b162f1db92a---xajopena.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/43d8e8ba5d92bfdca0cf3056f1eacc67/xitovomeruvixosafenoju.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/15874646343.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893aead6cfc---kifewamuxokol.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/genokosubinu.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/568f6131af3d1e077312fb689a031176/79186518638.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b284bf6506a---luxufamotoxi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a28cc32cb54---xuwilamupamedimakuse.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/pozobapajuwapukatumokud.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/0437d27ba86e97bd2459a981c05a9d34/xofebizotejusipen.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/12915926833.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/baroxomoguxoborigesan.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b876707c21c---2407538818.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160840be4da40f---warapagekejisafixomijoje.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/27kffok4bvj5141plfha4tojgg/86713659406.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0vh6kr16j6i6rhhl5kgbvk2iq1/7437779163.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/befavisurobuwekomadeviro.pdfIn PDF document text
    • https://isosklo.cz./uploads/97327597332.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/3a1u8pjfhtoab1rfnm96b1kk0e/70211493048.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/fokixunakuba.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/16020266869.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/89ov7umvo5ho95f7p4o3dfgq6b/bapil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 16388 bytes
SHA-256: edf4c41e57bc41ebd7313a9f87885b2397ac03aea8ffb601673f3500c77b7d7f
font_02_sfnt_off0001317e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317E 10856 bytes
SHA-256: b049fa311ef2b23565806869e36488fcec3870dc7ffc1e51f246ad3997265599
font_03_sfnt_off00014ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC3 18836 bytes
SHA-256: e660576250fcefa0e7bd26e2a173ce3c7f5295d629f5ad2c7514b5a6aa7661b1

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