Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b878547ea61190…

MALICIOUS

PDF

86.2 KB Created: 2021-07-07 09:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9793eb1a073294de983dc62e670be57c SHA-1: 0e5293d7d705e400db67244a8c549a77357b0501 SHA-256: f5b878547ea6119028131bfd7eed12b1d9fc284da1cd9c3a18811d22238f1511
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. These URLs are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://smidgel.ru/uplcv?utm_term=fate+stay+night+realta+nua+ps2+english PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fcdbec55d---69460665271.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/dupufuzu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076206c79d1e---11324737241.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/wofevak.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7020b885c9def2c1b2ab564c4d5d1cbe/20941128188.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/fijabawem.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/5s8c1ae2shqqa294u3uo6lu9i2/11636836629.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/pebogudijeguzabad.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/r89g00f9gjbn307i063a0rj0ao/4464645607.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7101a798---burogexakabiseku.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b35bf2909a---devupuwefevabaw.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cb0c9d71a---27653612246.pdfIn PDF document text
    • http://placc.info/up_image/2858024800.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/zinitutapisowuja.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c38f0f0dcf2---tumusebadazilebun.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/e120b70dce3aaa8690b3eded62c5e7f6/58450185684.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160876e2dd475e---19690529418.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/f44cmaosr71tiv4ttvn4lb3ias/51537210180.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/lepizigekurajopopif.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fa92cb5ab---98653175684.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c49d67c3---7024275056.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/bewujegisududasabu.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/xiwutaparen.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_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 18016 bytes
SHA-256: c314308dbbf8368f9b532111e4b4a4d95428d35ef29a18329b7b48959ab6a763
font_01_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AF 10720 bytes
SHA-256: b8581ddcc432baf4d081cf59d30efa9b5be68753e8f32e284a5c0422e410c599