Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad976e264e7b8b7…

MALICIOUS

PDF

73.4 KB Created: 2021-09-19 02:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b28cc2b548d7d0af1629029497b22102 SHA-1: b69372cd9ca2c9906e48a990f1c86413eccbbe57 SHA-256: 8ad976e264e7b8b741a2a40cefc653b243f30b2e1f4d443351f0701a1fa30935
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many pointing to disposable domains, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://dglytbt.com/upfolder/e/files/20210917013450.pdf In PDF document text
    • http://corporatiegids.nl/uploads/files/xodepi.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/91056178309.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/burujexoxegomogopubonexet.pdfIn PDF document text
    • http://360global.ca/userfiles/file/69385902406.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/jimafufadoge.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/sewiluvijagazafojesos.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/30689995524.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/47880560703.pdfIn PDF document text
    • http://rurisnet.org/images/file/82113926478.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/84237774370.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/pejozukudijuvodorima.pdfIn PDF document text
    • http://markone-tools.com/upload/files/54378458911.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/kibazajozukizefegavur.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/kademanogax.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/64423450193.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/lafudugiwivudeji.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a3dade5d6053e8f17d8d993b63c0175e/66911130121.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/31428018226.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/xuwobebak.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/doneromituwarutij.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109090846267343.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/cb8c3adeaf8de76854d2102ec647d0ec/lagesuzojanoterika.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56644268128.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/66119222324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=saving+capitalism+from+the+capitalists+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_off0000ba97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA97 11208 bytes
SHA-256: 944feef8860f5ad12a18773ca226a75009470b85ce0a273b42e2ebb2952a7b5c
font_01_sfnt_off0000d469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD469 16812 bytes
SHA-256: a9f854de91ab5e885aa803fb0924b8e7864e4e8229fea2bdd0683c970008ff1e
font_02_sfnt_off0000ff0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1