Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba4314952579cb6…

MALICIOUS

PDF

90.6 KB Created: 2021-07-04 23:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5a2c13a90a1456ec57ee2ea5acfe47d0 SHA-1: 0cb3cb34d9f5fd0670fff11fda12bceea4a98699 SHA-256: 1ba4314952579cb670a373786d0b8b4b8761de6e47950012e5360d513b9fb12f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting it is part of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a malicious document lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f9641cb3261a76ecd04476b762e5faaa/gogixobejon.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ca571b6b13ee47c25cf5fe4a7f8a2ec3/vuwivikakenidotuxefamokur.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/48522234604.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/18225721239.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607794891e71e---sikogezo.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/5c3a3b27659521018fbb3e45b0b9015e/mimegupovimulopavikupi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/3f2e61060977502370a831891342359f/xorinevodubonat.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be40816cdd3---47570828915.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/84f4d2ba7bcae388b621184051a0186d/giroxuvokiletukukilojo.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/fasivudi.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aae4a12f491---86213492828.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/xexonetipato.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/77357011507.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/tevinibodabedajepoboxiraw.pdfIn PDF document text
    • https://impresa-valli.it/file/48621892151.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609451f5ce648---12130171324.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957a2a04e74---2852653359.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/vavitawigakorifepunewixew.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/26312353327.pdfIn PDF document text
    • https://aedwea.com/upload/foto/71467082699.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160755492bd188---24121435625.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/16900953620.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/r0o7gjdejm6b3rkih626mqifvn/bifegikezuvonev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=12th+math+objective+questions+and+answers+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 11584 bytes
SHA-256: 569443c8fcd0d9e6703cc60d6318e91ae7e4a5bc969cbe7f6887e364c20319c3
font_02_sfnt_off0001139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139D 19024 bytes
SHA-256: 95731807fac5148e96ac1b5562e14ad4220eff1fd674effdac165106f06b9f05
font_03_sfnt_off00014595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14595 16488 bytes
SHA-256: d0e02ea597b059e12c640018e4c0b859d2fbe31b167f59dc9fd0dc6423c65742