Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d1ebe4e6761d7c…

MALICIOUS

PDF

72.9 KB Created: 2021-09-24 16:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 88b7f61525b3dff7ba2ce7266cc25219 SHA-1: cd2cda4652c4f3bbdf2f9e3b3dce28826d406ad6 SHA-256: 97d1ebe4e6761d7c163ed10cfea58aac4338608add78eaf51d459b8235b90151
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, many of which are hosted on domains that appear to be part of a link farm, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://butterfly-propertymanagement.com/userfiles/file/70729766160.pdf In PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/22563876872.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/97159403527.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/32594846901.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/42391666732.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/balenuto.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/5682143468.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/21040514862.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/pasisopenenipokulifiwepe.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/wonipadorel.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/tazija.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/97932436671.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/17114744935.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/79004672275.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/27707246607.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140308cf3537---bafuzirifizupepubalolileb.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/98888987124.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/32200687635.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/noxaxegujuka.pdfIn PDF document text
    • https://avistravel.activsport.ro/userfiles/file/18688637759.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/gemarililekabobabaxe.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210911_c0cfa.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c6a3bab0da---pevetunugodolomugeja.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210912202012148.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/fubajeba.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/49381175837.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/vuruzamivi.pdfIn PDF document text
    • http://araratmebel.ru/img/file/juwumovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=hamari+adhuri+kahani+full+movie+watch+online+freePDF 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_off0000b903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 10908 bytes
SHA-256: 2d2107c6248e9fff7f9eab3dca0cd364b4ed3a5122398c4e373e5e2d57a1f841
font_02_sfnt_off0000ea1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 16820 bytes
SHA-256: 107669a6a9267153a0c1ce544517f9386aa03c450cd3a04c6ace50982ab29b2d