Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f77a0590b15f605…

MALICIOUS

PDF

93.5 KB Created: 2021-07-06 10:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4c0befb2727dff9b0556f76652c46622 SHA-1: 0ed6c45784e924dd20245f81afa8ffc25ade0d92 SHA-256: 2f77a0590b15f60555093fd3357b0569b9eb9c1b7e20483f55b210bab093c1b8
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 WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious content, likely a phishing or malware distribution lure. The file's structure as a link farm suggests it's designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://krisoc.ru/uplcv?utm_term=wuthering+heights+quotes+and+page+numbers PDF link annotation
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d065r9kmq87lr6lts86v90tpor/20970633106.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/0c0444360346af72cad6c5da3e221054/41475451646.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7to2ajf791j2s7diqbocuo8bo6/64045910193.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160812ca1a76d7---92081215228.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/16556303523.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106050734581894.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acb619ed5e8---gewitobasebonebem.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/69731845441.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfc64dfd1f---53634214843.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a479db87df---butusidajif.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af91997a2ec---dogolanumara.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b9340052215085421e4d2c5e8b3f435d/xifejosuxogibiloge.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/c1rant23aspbs3kt4getjsgikr/50419098867.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768102c4ebb---61396848398.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/hu9d07gcslujtlrtjkc288qb83/fafavozimazoto.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1c1339a46ab51fc63a53175182994bc9/26462719865.pdfIn PDF document text
    • https://hiroyoung.com/data/files/gofof.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/23238c110b7e58483a450151f395ee77/bumuba.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/mewaj.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922cc313260---80030121703.pdfIn PDF document text
    • https://angkagenap.com/contents//files/feguroxekaxudizosokes.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 11172 bytes
SHA-256: 43d0077ee198f03760e1519a83cc84fca97f56d178b1095a6ff1dbcdb2bb51ef
font_01_sfnt_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 17248 bytes
SHA-256: b3db1148e2da58b0ad5b0c92b0dc8282e67ee5d725f6e4f439f7e6052422447e

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