Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2f9fd212ce7c3b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-04 11:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 363e073dafa6bbbf2bd4cdf20ad0aad1 SHA-1: d5ce09f3da4a9b382d988e2dc52faa77c7efd789 SHA-256: 2c2f9fd212ce7c3b43edfe06f2b0ce586deacf20c0a0f8156d1025f425f93d5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=sankey+diagrams+worksheet PDF link annotation
    • https://visualarchive.bg/files/50912402035.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072f904bca11---70600437534.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/64337064098.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/28438998728.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/59265869502.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/fagadatebaf.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a758c1d7c10---33540452219.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d33d9d0a5f5c682600bc902465c88a12/20455135630.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/jojigamumifemewo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/7213c7633061b12288bcb77de47fd737/45961360687.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/zemokofuranale.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8be7200fed---pikabezuwixamebokiji.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/da79cbde1bc0a485c8b7bd52e8393959/xipazazusebuguz.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/89571854850.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vo5bpdsf0teticc5b125kfl0qn/padawevolusadu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f6accc0ed11---9611104817.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/sejumolo.pdfIn PDF document text
    • https://vientangluc.com/upload/files/tabofavevuzovumazelepizer.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/viwimanar.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/futometexozenitotupamex.pdfIn PDF document text
    • http://innotack.com/userfiles/files/91373306835.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26bc33eb7e---82993090683.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9ea166db3---xiwepiwuriw.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_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 11016 bytes
SHA-256: a97bcbdb8174483f1b81af14d47577ef3a1768e9b38625198eb3dd194244cb8c
font_01_sfnt_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 17076 bytes
SHA-256: 2e7ab6d1abf5bfc82ee6fc941bfd4cf3bc881c488476f479a4b8343dd62493b6
font_02_sfnt_off00012a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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