Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c7c9eb4508e27d…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 02:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ddb9069b4923c7dd65a968b8de1a6605 SHA-1: 4397a03d4b853eca9bf3602bd4f6fd12ed37a292 SHA-256: b6c7c9eb4508e27d3e764b819268b10ca4020ef21e459c6dfb5231d4a3350769
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://amon-syotengai.com/userfiles/file/jakolerebiwigetadem.pdf In PDF document text
    • http://monkey-do.net/userfiles/file/97718569967.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/dapegebolusojarifeb.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/h7ln5hcmqj8fvs77g677jhlt9f/sakijasagatedenizijujop.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a59c0770292dbbf4c0e5fec7e403158b/vivisudejikepak.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62b789476---22722359133.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/42773836206.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/setofukimoji.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/231bbae99e1d9b06570c95850a348a76/javusezesumanup.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/6628059113.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/zaxiligarosetutit.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609acda76faff---65410583183.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bep1g3c697f32p74e95m1hu183/welodabofabip.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/8060495ef15c1ea97460f4f23efc23bf/35344241946.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/sunokufoveberujisoseb.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607179db4a71c---tuzawepefuzidodesekibeto.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/58983540234.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/oiumd9j199cniv91045mi9o55n/xejeb.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3625b5b92a082c13169d39f435105d19/6739493485.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3cff674ff---35268652796.pdfIn PDF document text
    • http://flexa.cz/docs/file/19257194308.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/bfa449e1369688e7bac7a0f208298b57/sufum.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/worivoketezijewarat.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc12556cce---77497973338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=division+for+class+5PDF 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_off0000e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 17184 bytes
SHA-256: d05bc36daff629ecf5075244338f11fdfbedad967babd3d202c16f45611db227
font_01_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 10300 bytes
SHA-256: 27db5836e6b5209001cf5f1df3fc2415c2afea7fa48b333cbe212a5ab9f5338c
font_02_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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