Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ed0dcdcb4b8cab…

MALICIOUS

PDF

71.9 KB Created: 2021-09-13 16:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a73c1c2b0eee2047b1578e7fbcd2fb5 SHA-1: 7585984a556410bcd72582f4a9906f33e25126fd SHA-256: 50ed0dcdcb4b8cab93e6496d2896d5c4bbf7ee8fd0218182e3725b8acf276e72
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. It contains numerous embedded URLs pointing to various domains, suggesting it acts as a link farm to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.verneteco.com/ckfinder/userfiles/files/17033089099.pdf In PDF document text
    • http://surveycook.com/upload/tmp/202109/file/menozutefiriziko.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/fukedexaku.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/batotomerelazetejodase.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/53459474228.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/62314614418.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109040606383831.pdfIn PDF document text
    • https://unaizahic.com/Files/files/53358993950.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/8303332d7b63f6c805000cc2fea162e6/dakarinamubabumajudasus.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/67907612525.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/10443443552.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/79868225444.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/zomutafojapufiwowi.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/paguzoxov.pdfIn PDF document text
    • http://air-ned.com/uploads/files/gizeraxomivufuwulol.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/ruxexaxesurixifima.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/93034110041.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/rabikapiluwelinasonuveve.pdfIn PDF document text
    • https://red-adlay.com/upload/files/mezuwafaviturosajiza.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b91695f50f---60575583051.pdfIn PDF document text
    • http://bdnchem.com/upload/files/97756977737.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/wemejavapepo.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/90688556762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=kodi+app+download+androidPDF 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_off0000b93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14E 16772 bytes
SHA-256: a07071a85ccc7893c1850824de883ab6ed182ecc05bb81e6107ef9490febd29f
font_02_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 10064 bytes
SHA-256: 7c7f7e2a2347ae1444896e3aee464a13301c57a33813d8ca1c82e590a2a5ce73

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