Malicious PDF — malware analysis report

Static analysis result for SHA-256 a143005064b2cc1e…

MALICIOUS

PDF

73.1 KB Created: 2021-09-23 18:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3ea3df94ae4a23a3d69067e8d95ed228 SHA-1: c9e76e3bad93f04ebfee0d07cb7fb6e3b7780247 SHA-256: a143005064b2cc1ebbd7dae68f463ec4b5217b7fc8198a1e11944f79dfa56b8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://elsa-daulte.com/ckfinder/userfiles/files/98060768628.pdf In PDF document text
    • http://hanifeugur.com/image/files/79044408916.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/mekupobalaga.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/9140514583.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/78016784533.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/58659118493.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/7228600650.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/9db3d451592c0f44481f4c345bf39dd4/jijoxuxexolom.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161436d02b3945---85392254540.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/96133814891.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/50098621375.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/33084120958.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/46163030532.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/91969861837.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/xikezaja.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/wejamirorepakew.pdfIn PDF document text
    • http://evola.it/userfiles/files/wefimuniwavewiva.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/teguvuteri.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/kaxazinopitifejaribi.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/kolomutekopaxepabav.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/zedufadamewuzisokezapifa.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161395506bced6---97893030939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=cave+app+for+moviePDF 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_off0000bcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB4 16944 bytes
SHA-256: dbd72e2ffd74bdf1ea5bb557f4c901ce3fce25c00d8824f7d46df73a03a2e562
font_01_sfnt_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 10200 bytes
SHA-256: 4017b7514f96e56e6c8f077d4c532063a2bd752f92ec915d64b8ab54bfdaae4b
font_02_sfnt_off0000ff05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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