Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d49c3f6abca90f…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 19:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4bd6772bd800d1292405f5c191a3ec35 SHA-1: e72433cc06930efd7dd7b34f52f9ba453e1a58a1 SHA-256: 95d49c3f6abca90f24465b0249061035ea69e4488420511dee9a2d95ba49f36b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. This suggests the primary purpose is to redirect users to potentially harmful content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://1day2night.com/UserFiles/file/jifugojo.pdf In PDF document text
    • http://akgwealthplanner.com/crm/files/fodekamujoxuvo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614529d184fbd---90048979303.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/jegudibodaxulu.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/11313266759.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/57082448472.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/vomojuxo.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/wutemipagini.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/67527975504.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/bidod.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/xukenamolik.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/67259587137.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef080aaad---bekijolijudosibuxak.pdfIn PDF document text
    • https://le27.fr/docs/file/13174527408.pdfIn PDF document text
    • http://cosyromania.com/media/file/vuvilevizomerixivaloxomo.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/menumedarukiwevuwuzefi.pdfIn PDF document text
    • http://newshop.jp/archive/file/jufelixuxi.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/68353708712.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/vibiwurogiwa.pdfIn PDF document text
    • https://digireg.se/upload/45810911418.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/ruwonugizoma.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/levamirusulisomojewet.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/bomizuwetotefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=eukaryotic+cell+different+from+prokaryoticPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/21315212737.pdfIn 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
    • 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_off0000aefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70D 15548 bytes
SHA-256: d2e5d1fb3c1dcd1867ae91d28fbffa329649d4b0a61d7e372c7bf7419a4d11a9
font_02_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 10900 bytes
SHA-256: f532d919fbc120728407a35780134fa93cb46cb71685a171c4d64b5cf07242d3