Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eecefa53099c38a…

MALICIOUS

PDF

98.2 KB Created: 2021-10-07 06:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 60589ed0d3a75cddbcc8c9b398a0c93a SHA-1: 570a3a41df2cbaa31f60b48e00d9acc6130ba196 SHA-256: 2eecefa53099c38aeae08438f3298cf3f95087bdde7dcf6c316a63ef7ddf1a6e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://strategieb2b.com/userfiles/file/durugagetolu.pdf In PDF document text
    • https://philly.drinkpoint.com/uploads/files/funir.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/6047404029.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/45310059292.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/zukebomunifudekafedule.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1615a0b2f718ab---93500418660.pdfIn PDF document text
    • http://webs.eusko-ikaskuntza.org/files/galeria/files/57272956592.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210925041019.pdfIn PDF document text
    • http://eva.am/files/a489deba9f9d9e54.pdfIn PDF document text
    • https://togeltop.net/contents/files/nunogakojafobowik.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/63093868540.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310eefa77c7---bitowo.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/gugulanarosaga.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/turejesefixav.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/tofabozikonaketamemuz.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/99030813121.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/68590265618.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nomezuvaworifedanilizad.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/midofamizuluforetagunubi.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109280102332693.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/kezuritodevozumumokoweb.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/89613965454.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/delumoxaxuzagizek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=nicknames+from+mPDF 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_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 10424 bytes
SHA-256: fc9712ac3e6d8ece968477cc65d86b4dfe543628df120c7d439de5279c213089
font_01_sfnt_off00012d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AF 20136 bytes
SHA-256: 6e903235ee5a4f4951e956aefee17442b4c78ea89923f0151e2f3594b0016438