Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d4cf8cb46fa367…

MALICIOUS

PDF

70.1 KB Created: 2021-06-16 23:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f736ea54f66532f5f3860c2870610ff2 SHA-1: 2dc12774c1e9dd97f94e73d92dbe8911fc5eb15d SHA-256: 02d4cf8cb46fa367572d88190323b4ee3b223eec981c5fed4c3616a01e1114f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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://ketchas.ru/uplcv?utm_term=tell+me+you+really+wanna+love+me+forever PDF link annotation
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/t461vpnc6n2av3qb877ul7do49/34685503644.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/151a90ef5997841da07717557f680475/kokel.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160998dbeecb02---25573199343.pdfIn PDF document text
    • https://marigabung.com/contents//files/pimotovubizasa.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/tibexofoxosul.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/1269040444.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/54d0f105edc71752a561fecb29aab0fc/kejosifapixesitujetonok.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/g4eakuhp5v2753dl3alnk0lt55/207345121.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ae13f3488fcb53ccaa88b36500ade723/48867628480.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee3dae13dd---18667615980.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/8565201832.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/kibakolevo.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/gitukevevapowenufas.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b392a57aeb---12881859248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 4940 bytes
SHA-256: e6a5b8cc88aa218613432a8f9ad2c0b12ea2c8ee58551fc65d7b008b81876474
font_01_sfnt_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 10496 bytes
SHA-256: c99a8c95038f63629cf5567efbd016e20c66a97aa948297f64fa0f432bd2e42b

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