Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aed9cb6f2509e7c…

MALICIOUS

PDF

82.0 KB Created: 2021-10-10 21:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fd5223990d22e789ff087f728fd90106 SHA-1: bd3c0d1208a4d286c9a0c18ee198ca782864aad0 SHA-256: 3aed9cb6f2509e7ca543cc839c62cebb56622de22599da7dbeea2d6575d82781
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. The heuristic firings indicate this JavaScript is used to redirect to external URLs, with one URL being part of a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The primary attack pattern involves luring the user to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://nomylo.ru/uplcv?utm_term=best+remix+songs+2020 PDF link annotation
    • http://castel.lu/userfiles/files/zajibawobudozisojuri.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/74912171902.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/zojasaxele.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/98089168440.pdfIn PDF document text
    • http://hangquangauto.com/files/51968994097.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/gavilazitef.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/eeea3215e66a65d0a1f80511881b528b/98306566456.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/82188092866.pdfIn PDF document text
    • https://cape-electronics.com/media/file/40403850070.pdfIn PDF document text
    • http://djpress.pl/Image/files/66365002971.pdfIn PDF document text
    • https://kalafiber.com/webroot/js/ckfinder/userfiles/files/vojaxije.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/digejo.pdfIn PDF document text
    • http://rentaruedas.com/files/others/10119652831.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/40306883554.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/26127481144.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20211003_C9AD050382389E05.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/51891149960.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16161a01c43250---80106488727.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/18153169091.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/buduvatirebafojafus.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/9336626371.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/99548680805.pdfIn PDF document text
    • http://puisan.ru/uploads/file/mozebenuluk.pdfIn PDF document text
    • 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_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 18296 bytes
SHA-256: 3de1fc019b9ec4e3bdf31d14d7f37dd11bd4c02f7a6b7b7e8e91e0428b001a59
font_01_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 10640 bytes
SHA-256: f37c1a623a2b0dbe477edecb6f7f0f7b188dedceeee54c88039d79663329c934

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