Malicious PDF — malware analysis report

Static analysis result for SHA-256 293efa59c5ab3b4a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-05 13:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8624bc511a9fd3c3d4fe789c2b92498f SHA-1: db63d12dc8b8fdc3b09af923ada61d421e86cd8e SHA-256: 293efa59c5ab3b4a74317a0126472a66e907dc99197a94d3c8b8b9589d083358
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were directly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://rugsdirect4u.com/uploadedfiles/file/disano.pdf In PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c5965ae70ba---nuxakoduj.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cca2f55b7a---3160841623.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/juxujesexegosufozokepisop.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc13105e21---ronota.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dh196iekv5s7289vabb5tiued0/11906004560.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ob1f7432bo3lhpod3j6ndkivi2/25921071615.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/40197768813.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/62976431884.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ibk637ustmetrul2ilopprn45q/88120896862.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/savuguxijaxebojubez.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/65528501768.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9af072413c5252b769ae04af5d84aa8c/pewiwikuponumak.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/nawopolafod.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/wuxofalevizadeselifasogo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/vnr66kspd1k9mpmehtbmqc6ajr/xigimegeratabo.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/joxonuwalirabise.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/vebupekev.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b5c4ec4c1---19588756576.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/vakuluwerodur.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160719a28d2e62---towoxet.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/wuwalofuwoza.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/rakuzufebaj.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/keposomoseme.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4221b753b---35310190957.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/53280709744.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/sanajitewalora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=zimbabwe+cholera+outbreak+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_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 17840 bytes
SHA-256: 8e8be623bc528976a3778835475c7e771b2265e12edf99c85153f06456749774
font_02_sfnt_off00012a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A09 10996 bytes
SHA-256: 2e07bc6bcd6e44fd20dad2e35055c450b122bc06e3e1c9a37e0f5a281436836f

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