Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab613067ec74899…

MALICIOUS

PDF

75.2 KB Created: 2021-10-06 08:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 78cd026a0a0314c9335e525310e92cef SHA-1: 10b650f0002b177f107a97f73d3f6d90951000a2 SHA-256: 3ab613067ec74899273a23d41a6aee4984c37499fe8a24991328504a689fbedf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains or redirectors, suggesting a link farm or phishing lure. The PDF structure and the presence of external URIs point towards an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.petersonassoc.com/emailimages/file/36284779656.pdf In PDF document text
    • https://2winit.com/Files/files/sekiragomoxalakukir.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/vutijusaxa.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/73098941848.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/3279623496.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/zexonotefekobadisopesiz.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/58765030758.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/mifam.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/biridoze.pdfIn PDF document text
    • https://timavoshipsupply.it/userfiles/file/52321607109.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/43761225138.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/85688937029.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/54771141582.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/dejamubo.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa397ca6c8---36268616990.pdfIn PDF document text
    • https://12shio2.com/contents/files/kelimukubela.pdfIn PDF document text
    • http://wuchem.com/upload/files/45655571779.pdfIn PDF document text
    • http://wych123.com/upload/files/vigukipenuzezajazex.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/dovurema.pdfIn PDF document text
    • http://cke.hk/userfiles/zuzuvotopifizeve.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///50008472279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=scalp+dysesthesia+reliefPDF 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_off0000c402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC402 10684 bytes
SHA-256: e7d959999efcadbdce135b39863b47c964cb38728589c8390f6b8a5e7cb0ea1d
font_01_sfnt_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 16492 bytes
SHA-256: d66c0e5a0c317fc62bb44d75af3f159247a483af0ac5b29ef3406844a3356c30
font_02_sfnt_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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