Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabe270ac5263889…

MALICIOUS

PDF

84.0 KB Created: 2021-07-01 19:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 148dd8466be7195b5537a6bc23675950 SHA-1: f91441b857aea1ec1dcc478a36c7c9f68ede45fc SHA-256: cabe270ac526388952babb0bf68f72492bea28ab5d03ef5b19cf2c3dc619c902
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://wastran.ru/uplcv?utm_term=pdf+to+excel+converter+software+free+download PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6fdc71e6d---92661966859.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/59745ebd89e708d641eabac59e9f0483/28577965515.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9790708857a82438a70a1f825a8c3027/9996519160.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825e84abced---xusilot.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab56eec58c0---83624291788.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/wevemejozobonibutet.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2e5247597---giredopovokiwerog.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073f87328d1b---46957131444.pdfIn PDF document text
    • http://hevolta.com/upload/file/gisunokudediparegakif.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ofhs4d76iamoktu36kdm8dhve7/xenawonazejumewi.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609185a287a2d---wepapowujoteferabelos.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24fc183766---nugileme.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/72309286768.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/gmo2eih0hs96mb5vqn9mn48d9k/50956622089.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/62759836574.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/4177800033.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/76db45d707fb3205e64383603938eac1/jexiridib.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160792c56b88f7---32965223715.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/n8rciu67p5r4f5a2jdmnq69qb4/12726168780.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f45b36e7e---pozomefonutijinipekuxo.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210619_190304.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/27a7a79dafb4b442619b71aef4cc1ef2/duximajogojezob.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_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 16624 bytes
SHA-256: 76d6e0361521f9c17e7de64126067f6800a0c2d583e5e934c0eb3107a25896a7
font_01_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 10632 bytes
SHA-256: 59ed0d86de8baa0d35119842479072c3283e79d471dafdae343a0df20b8cfbdb

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