Malicious PDF — malware analysis report

Static analysis result for SHA-256 445dae3e75f576e5…

MALICIOUS

PDF

74.7 KB Created: 2021-06-11 13:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f1564d66a92de56781ba554aca2c34da SHA-1: 5eb0de7835a295955f730917f4c62235e720e29c SHA-256: 445dae3e75f576e5c9ed266cd1a5c3cbc59a71b3a8272780a19f454179f8e467
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload directories, suggesting it is part of a phishing campaign or malware distribution effort. The presence of external URIs and the overall structure indicate an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=sarkar+bgm+ringtone PDF link annotation
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/8e9209eeac20ac37d1d571ec35d3259c/23246137034.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/77480952698.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cb9e56202ac9e3d5a5af2111d9d42c0f/falogesen.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5a563fdb---44910992400.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sgnu036kbftr0qc95njf2p8f05/resegejanefivegur.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ac6e0d1a1395f155397ac2a95771da08/13033481876.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/lopitituxudotezomowobim.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/pgepqbduht6t4gm2dlf5s8u3ar/zefalapivirajilipixotesa.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d9066061ca1ac9afe3dc5d24c8e818a4/93237731011.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2835b0b288---jufotagasowu.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/2797780508.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160860df4d55df---gesureruvixami.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe7a3d4c69---gikeragowirovipevisanizaj.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa62c84e1da---31156867038.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810808b0a09---10588832033.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/mipoguvimaketoni.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/62296915971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60F 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 5104 bytes
SHA-256: 36f79c1d73e217a7116e7b953f52d1ac047585170e2f671dd17e8cb8cf946f57
font_02_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 11016 bytes
SHA-256: 3e05376f6e999efea47c7a8f6b1c5fa71c46b6e4dd77a45e2bba6d4eede25272

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