Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f74cb82d0540f79…

MALICIOUS

PDF

84.5 KB Created: 2021-09-20 04:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0ab81f2e865d2b7548bce9174fc14283 SHA-1: a3a1b533de5c19ce6a6f4a92dc8fc9c5687c73ae SHA-256: 8f74cb82d0540f79b911f40c98c9a7023a2c5055dfd39928f2489ca197b8617b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF containing embedded JavaScript and numerous external URIs, many of which point to PDF files hosted on potentially disposable domains. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to trick users into revealing sensitive information. The embedded JavaScript and the nature of the URLs suggest it is designed to download further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://catamma.ru/uplcv?utm_term=vidmate+galaxy+store PDF link annotation
    • http://fujieshubao.com/zk/UploadFile/file/2021090114201773499.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/37257397565.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/99388387111.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/sovalibogegipo.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/36333914570.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3fa4c14b9569a2bcc66aeae73279f186/51787454090.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/gexix.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/74879138548.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/faditudepuvoxatuwi.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/80585737252.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/jikazaxugazusumito.pdfIn PDF document text
    • https://datenglagi.com/contents/files/gekinolij.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/gafumiladizivumogudowi.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-18/20210918133257363129.pdfIn PDF document text
    • https://kopari.hu/files/file/risodunitosup.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/58337835136.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/39805481445.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/70091597938.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/monag.pdfIn PDF document text
    • http://adriennemason.com/assets/files/difutaduxifulubirijivigaj.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/98429803717.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/20fa54ddab5460cacc989b6961bdc0a3/53612419905.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/xirugerupabukotororogele.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/nekuxudelizojewimije.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_off0000e2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 19208 bytes
SHA-256: 7eb4ee551ed01635cb1b1dc40f4fac34305bbc906af624d13cacaf98b9c76f9b
font_02_sfnt_off00012ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCB 10672 bytes
SHA-256: 9a3bf8a789f54a8b2bf575ec70367bbafe5a53ad1214a52dc7b7cb0d46877a80