Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2210efd7b1cf9e…

MALICIOUS

PDF

86.8 KB Created: 2021-09-23 14:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 56c5c8aee3c934d37e999b9a5dbc8b37 SHA-1: 770bb591a838108d2f775d2c3ecc42f878b54b66 SHA-256: fd2210efd7b1cf9e5d6f2a69ab1eebfac24ecb85c2ef862c800b3be946419bf4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of URIs, many of which point to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.examnotice.in/uploads/files/tuxufililexuloxuve.pdf In PDF document text
    • https://pr-dienst.ch/file/97167552337.pdfIn PDF document text
    • http://quranday.org/userfiles/file/44667532025.pdfIn PDF document text
    • http://gfk-schwimmbad.de/i/File/98991741830.pdfIn PDF document text
    • http://envigest.cz/upload/file/64397780018.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/gavonipamodekelixitite.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/befelefupuvivivo.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/dogumibidesem.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/73453335829.pdfIn PDF document text
    • http://airmon.hu/images/files/notuxizolemewepokap.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/86099762181.pdfIn PDF document text
    • https://kimcert.net/E/file/xovawofi.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c42dc380fa---dopedekupubizorutor.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/xekilojoxijut.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/namiresapiko.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/27671898153.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/xewojezexezizugeleguz.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/zoliso.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/kevisikumepunosa.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/25563291046.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/36354705545.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/jukoluzifis.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/82056161903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+preeti+nepali+font+for+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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 20404 bytes
SHA-256: 5dd8f53cb15690af20447aa94af4dc3d6a8f60f3174fcd3046544ade5243f552
font_02_sfnt_off0001363e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 10408 bytes
SHA-256: 5bec3da311c1344c5353e10033854c293eb473e12534489f2da79ed36d5020ad

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