Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d25fb36d286c78…

MALICIOUS

PDF

810.2 KB Created: 2021-06-30 11:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8fa8bf3e2d4938a3062d7ca83f9a1353 SHA-1: 68e020b9feea11660899d9975196e96fcf1200ea SHA-256: a4d25fb36d286c78e4d64a45536eef9a38e30a72eb736acb7d551183c9b46869
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external URIs, including links to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the detected threat point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5274

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=now+behold+the+lamb+kirk+franklin PDF link annotation
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080374f145fb---gobapevojozukofexasavab.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/80685822120.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/xogaxom.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/29090195460.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/tusevikike.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/rapujutitekero.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/o8js4sihj0puq2odibns4rar0n/gudiximuvibivibafema.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160bac877a411a---85479495841.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/60424040541.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/98839880847.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db864e0e90---57411479900.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/11092057064.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f5f59f32---82699080994.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160879963cc5b7---mopafosifizu.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/98080508879.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/rudvqtusdlkk1k7kkb1m09sv55/piputatojanifapofomatej.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071951779d19---tuxekesavusa.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/44095159225.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160873d6f59ea0---98324939192.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/06/23/20646766382.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/b5697391f71f9802077b9b6017c5dae1/tebigumi.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/47930169036.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd24cdab34---92420391116.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079466b465f8---93586479488.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_off000c1c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C8E 10748 bytes
SHA-256: 6e87dc59bfe5605f5ff44d83c6921dcff22e45affde61fe527767630a5b46577
font_01_sfnt_off000c351a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC351A 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off000c4a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A98 19232 bytes
SHA-256: 311572e5cce448d1b36df2ea197ea22360d54325cf2c3a55b1b32e8d5b37bb4e
font_03_sfnt_off000c7d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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