Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3fc343da718a74…

MALICIOUS

PDF

103.1 KB Created: 2021-03-27 22:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 719488737b240f1bc9c4a03d06a6cf58 SHA-1: 7733ec41fde84a5abe71eead14d347fef02b3efe SHA-256: 2c3fc343da718a742c22079de3cf7cbd684f7c2c392568ce208d4d1e834bb8e4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://zajinet.ru/award?keyword=transgenic+plants+bt+cotton+pdf
    • http://cenderaoriginator.com/story_outline_template_google_docsemuin.pdf
    • http://chaptejvxz.fun/13483736391ikuom.pdf
    • http://masalev.ru/13684505941umo46.pdf
    • http://drenajkrasnodar.ru/lararoguxasurigekejeo5y.pdf
    • http://rejorevubirobu.sportsontheweb.net/kagoxuje.pdf
    • http://copyrighthelp.info/dls_2019_hack_apk_modqphvf.pdf
    • http://jatudoz.getenjoyment.net/vexazetoxo.pdf
    • http://gebikomuxe.getenjoyment.net/82721258167.pdf
    • http://parhelifrl.space/dudeviludflc3l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dfef0556-0fd3-4635-acbf-eeec5e8a3399/53919820287.pdf
    • https://uploads.strikinglycdn.com/files/dffd931e-79ff-4cc7-b49c-66917a6d1869/39764702662.pdf
    • http://kuxubakelixuzot.atwebpages.com/51153667816.pdf
    • https://s3.amazonaws.com/fidefofudi/formal_dresses_plus_size_stores.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/92694761411.pdf
    • https://uploads.strikinglycdn.com/files/1dd0b7be-de65-4464-8748-3a2c7799d96f/alexander_the_great_accomplishments_essay.pdf
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_1aab8039737f4a9a858629b14c3eec6b.pdf?index=true
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_ba13209fa9514ff596d3b2ac47f93219.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1c0fcf28-4503-4d22-b1dd-bf9620d1e2d2/mawujazevaligumisevu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015697.bin
f37d59bf8ccb9763cc8da575b9055d1a0fd41868a01bd0b8f165ecc902679e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15697 5412 bytes
font_01_sfnt_off00016907.bin
b9480f0d66a57fe05d4eb0ccbcff888dc85e473630bba762577884b58f139907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16907 11300 bytes

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