Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e16dc0d2162b7d…

MALICIOUS

PDF

94.5 KB Created: 2021-05-19 01:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f4a0d48fa0754cf72a05827b521c8e8f SHA-1: 0effa79ee2983ffa348fe05a67ac48e342958b4b SHA-256: 43e16dc0d2162b7d45dd8373ff1ef0439d1d56dcc39422fab5b49b07ff05c084
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The presence of these links suggests an attempt to distribute further malicious content or phish users. No scripts were extracted from this sample, but the overall structure and URL distribution indicate a malicious intent to redirect users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/dfe91fd0c2cc8b2485444c2a4d04008b/rimujakijirubiwekezidid.pdf In PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f17f91973b1cb62e37214976dd03036f/35737854225.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f860c9d12591ace6362b299e97281a52/movifoz.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/jupifatibomepuxulaxomi.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/96ueq33mrl0cqprha8kkspv33k/58631378947.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/s33555pqm9j5paqhqiuatfjr62/nazubujixobifo.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9362df8b---vobil.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/dejerezatowoxojilasupi.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/49832626739.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b5fc2412d---17112311576.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/5d415dc3e68455cfd9133ffacb80ee66/sepasekopuridawumuvanomu.pdfIn PDF document text
    • https://actor-conseil.com/files/file/26172925563.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ab735e393---14394695054.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/figuvarofomobewidimipo.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072629c994fe---zevefeleputaweto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=histologia+ross+7ma+edicion+pdf+google+drivePDF 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
    • https://drive.google.com/file/d/1-pgERhc58UV4y0T25SPdO99XRzajAi49/view?usp=shariIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 6476 bytes
SHA-256: 5c96381b2956ba85bdc606e02b4bc67750563a6a571ffb0d67253edb336a5a64
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 3080 bytes
SHA-256: d9087c9e8a189e2151df8c6d930955565192b6a212b47bb25378c95d1cdea0c8
font_02_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 5576 bytes
SHA-256: 1eeca6f2faad2578634e9e9ef61fbd6c03645fdf060de665ddbc6fb2f22f9fd3
font_03_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 6700 bytes
SHA-256: 5e747033acbf371403237ff6a5a8bfb8a604c234bf417232bf6f0b8975372fc7
font_04_sfnt_off00012110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 12324 bytes
SHA-256: f56cfb1585261cb546742f1b39f299f16b3225f456ce779dfd78cdba7259a169
font_05_sfnt_off0001491d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491D 17136 bytes
SHA-256: 67a1133b867fe03636760a1dfa46a2d254c29f8ad4655f03dadad777201a2258
font_06_sfnt_off000161dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161DD 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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