Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf2dba55843a012…

MALICIOUS

PDF

74.0 KB Created: 2021-09-02 16:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a68acae7b9fdd92243573d608f7a6cae SHA-1: c0e94821413a1c64675744b5c16fd4cfe85d135c SHA-256: 6cf2dba55843a012076d13d87730aa8519aa92d62a3aef59ec2ec3da1e3f95c0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into visiting malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://testplanet.nl/uploads/files/fawukexedokaratufa.pdf In PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/54844fdd0d20561e6cbfe17311e1ac31/fuxirifutimowajapu.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021053122425190.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16082bd8e3eec5---18478313171.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/mujogi.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/xoribiwaza.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090b905945f6---ditutesa.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/d72f5feba5295415ba41150794837eb2/17265418468.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fiweporukufo.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/gekomigokivewuxuwuli.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/gemafasevu.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/kaxumazezutikuzuzex.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/lejilebedemizuka.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/f0d06ca24998c9deed8c22e041132b2b/surekoxudolak.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/dijivotorilojoza.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2085dfa3a---52463840117.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/wemevudun.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf5faf09a---98234672140.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/831339df1ed2fdf74fd45fd3e9c53b0a/78517958609.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3cc010f67---zugokamu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/719d659c8548a165a988e92149127846/dokaris.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/matoraraxajona.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/747bf42caee44c0180ae2b67ec5871b2/fuwupaxaxefige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=appsc+group+1+latest+syllabus+pdfPDF 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_off0000bd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD99 16612 bytes
SHA-256: 555bf2399cf83cf5414f6f2c6de19c5e0f9a77b7523e9b7e59b3856225ba3dff
font_01_sfnt_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 10984 bytes
SHA-256: 8843cb33992f9d2925f9ea14954ab5cccaf6cfc041596585e920fc978edbb3c5

Open this report in the interactive analyzer, or submit your own file for analysis.