Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06542e12ff01e06…

MALICIOUS

PDF

143.7 KB Created: 2021-07-25 01:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ac0546fc7b5b7dc86e97c1b251af465c SHA-1: d0c96d5cc4cfd5f0bf9f7f23e66b71647bda5549 SHA-256: e06542e12ff01e06f42d78e5de885568374d799c08b71cac8501fd2680bf8b07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document used as an initial attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

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 http://synowka.pl/galeria/file/tezuwewiruz.pdf In PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb70b40a3d---jonekivemonikavikarip.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c798bbc992e---85773670732.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/v7elsjqvhas7227cto141a855p/23277284819.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/81f845e8f55808f212f5861901012f31/50304006966.pdfIn PDF document text
    • http://farashimirooz.com/files/45584014866.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/85ahpjink8h13ub28p00mm6gs8/gevuzadepeme.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ee05df2b9092406cc747f4a9556e6ec9/gafetexa.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210721005125.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2cbd5a091---52638518330.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8985b7f4f---nezexi.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8db02e0a0---zubukixojulotugu.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/pizorekoxisoji.pdfIn PDF document text
    • http://15889163.com/ckupload/files/pekov.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb0066c64---sopabutororofufogad.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/097494dd3d0036cb74321532aac0260c/92256316893.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d2b538b6---11887369865.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/sipirif.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/kijonaxaxe.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609021b8f338a---4935252513.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/poredafofimetafivuvokes.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f08a9c978---53535144298.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/de35cd75ad8d045cacd23fcc096ee782/27451210550.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c9cdea6d0a0b071ce1a42e4c12af3898/47745886111.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/24377286475.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d86899b6c1---telaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=celf+p2+pragmatics+profilePDF link annotation
    • 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_off0001cd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5A7 18596 bytes
SHA-256: b3a2296312cf703fc31e9ae269c9519ebabab6b5b4146118af1d54374dda70ce
font_02_sfnt_off000216d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216D0 10868 bytes
SHA-256: 3088a9798af2580547186ef09fd3ae1bcdc8cc9ef3827c0cc7e8bc4a812ef829

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