Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e3496132837ee2…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 08:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b8d95e1700d42299ed4ed27a115f84b0 SHA-1: d8aa4379121f295a45a4133b0ab403c6603311b7 SHA-256: c7e3496132837ee20c44ef749dbb548bbd74f1e1a954e4f635a08f7ca9479045
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, functioning as a link farm. These links likely lead to phishing pages or serve as downloaders for further malicious payloads, indicated by the ML_NYX_PDF_MALICIOUS score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://smidgel.ru/uplcv?utm_term=fever+with+bad+taste+in+mouth PDF link annotation
    • http://amphorabeautyclub.com/campannas/file/gizaletomidogifux.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/in4jbnokj8k6jc86q1ev6dfqg8/berelojulafozirajikogos.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/mevid.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/m31kl9l8oqk1s9ajc0fa1i90s4/45118199574.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41047805251.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/jenanefivesadinurigunula.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47ccc97d58---93651758251.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ptksb1gajb650vlikhtd4eatct/52077501929.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608816a7d0591---lasefimomisubopad.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16077c90f25344---9261901363.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/19036737414.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/tadafokezozopuvog.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/a0186b632dcf05d0f6fde4ccf77f18ba/tifebobuvixisetidotij.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608517705ee92---31007337155.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080fbb45d2eb---56785009186.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fa15febd---69907341744.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/jijutodixelebo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085a0af7ab5a---92125401394.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607372a8a6b90---99419134550.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55b68e9e3---lodenojipopopeve.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/60999592404.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/zujisikagefufewimiwi.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d426d48e3d1---24483249058.pdfIn PDF document text
    • https://steammining.com/userfiles/file/17047559922.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/72674f60ff745e0fed489f3d799ceae9/74197488417.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d0ebb7dcf4---rewexanodigojusevado.pdfIn PDF document text
    • http://swiss-ex.com/nesitinoja.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_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 10836 bytes
SHA-256: 5ef9fdf8c5329091d60e83df09d769ba65a9b04f44fb65c22e7d399d83147b96
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 16676 bytes
SHA-256: 749822ae7e4bb17775a35a90fbbb4c2ea3e4d374e08941c61b0cfc5fb73d890f
font_02_sfnt_off00012f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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