Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2b60dab60087b4…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 12:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4c0c10b92d2a3f274edeca284f3c4ae9 SHA-1: 3ad90c35d327712102fb2833d9003c703eade1fc SHA-256: 5e2b60dab60087b4f1d3bb2e072dd4e63eca2756590941802a37889f98a38499
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains, likely for phishing or to serve further malware. The presence of numerous external URIs and compromised CMS upload links strongly suggests an attempt to exploit user trust or vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=introduction+of+groundwater PDF link annotation
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ed32d46cb---gajukabuvanelaxo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/572412cf4ccd882d40c00f9b60e6de2a/47653107618.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e6cf27d0f---gesetepijepuduvamonix.pdfIn PDF document text
    • http://capital96.com/userfiles/file/43723881830.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/4b0fba7ce5526cf4f2e58c131e843125/37887601493.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160902ffdd8237---90696399203.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9fb646189---leperabe.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/53343849570.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607076b0bbefe---39697869991.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae8085f5c8---45046381295.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/weduwowudujipevekifibiro.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e1f0e005---78465277746.pdfIn PDF document text
    • http://sns.hu/_user/file/34979366922.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xegive.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/62412106446.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/617096c6aeb2451d49bf5e972f39e28e/sudonaxem.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/uglggopioga1lv7leig8agmkuf/88423432891.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/15406049665.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c221913eb65---magewilopawumi.pdfIn PDF document text
    • https://tavio.ru/files/file/waguderuxopil.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i7re0sghi92jh3rlr7kc4hq6gt/7131202489.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/f18b0e2df58c87591c904eac108794f5/78858372014.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c95466848e7d5515b6f4c4e5e82b062b/70644405910.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_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 10576 bytes
SHA-256: fa597f672ac2582d2c5cfa9e91bc3c493c304c5291aeef8467f03566a9101405
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC0 17408 bytes
SHA-256: 353e3934036a48ecfece1d2fad1afc72a15d13fafe489c7997be798d95fb2ece

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