Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33b1f061a925da3…

MALICIOUS

PDF

73.9 KB Created: 2021-03-19 00:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff86946a047a04f91853e5c4fb727af SHA-1: 5af6db255c519ef01adb06de750361fb2b2f415a SHA-256: e33b1f061a925da3acd41707859163d5fcf0828cabf040da1cf0fdeb4d669a75
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm or phishing lure, aiming to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest an attempt to exploit users through deceptive content, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=information+technology+worksheets+for+grade+7
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/mowunise.pdf
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/2738542.pdf
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/8162451.pdf
    • https://kafunuxuvivupar.weebly.com/uploads/1/3/5/3/135303333/gajisobabaxex.pdf
    • https://cdn-cms.f-static.net/uploads/4487005/normal_602e256eac0d3.pdf
    • https://static.s123-cdn-static.com/uploads/4385415/normal_6005c8f3935fe.pdf
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/7486601.pdf
    • http://digerutejonoju.22web.org/8475935814.pdf
    • https://static.s123-cdn-static.com/uploads/4461761/normal_5ff9722c2b799.pdf
    • https://cdn.sqhk.co/goxupolofodi/4Ljdjhv/kylo_ren_lightsaber_replica_hilt.pdf
    • https://cdn.sqhk.co/lokiwejawe/i0jeieF/the_diplomat_s_wife_movie.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juzujodajemafa.rf.gd/splenic_embolization_guidelines.pdf
    • http://sukasorepej.rf.gd/endless_summer_book_3_chapter_10_answer.pdf
    • http://bojefej.epizy.com/jamaku.pdf
    • http://xobekorafoza.epizy.com/zenuginutadiresefizi.pdf
    • http://gogegoxo.epizy.com/wekolelax.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_826ffad1bf594f53acf4d4f1ab4ce748.pdf?index=true
    • http://zasegusof.epizy.com/kizhakku_cheemayile_tamil_movie_songs_free.pdf
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_c929092adc7e47b89117c25142ffa003.pdf?index=true
    • http://tiborumaroxotob.rf.gd/autorretrato_sin_mi_descargar.pdf
    • http://vikitadutuxorus.rf.gd/ruger_lcp_2_laser_holster.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_off0000e25a.bin
1e5dd797a8fc7208c665ca7f7a8f53b5e55a3fe4bb0483cdf472958f3cc986e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 5712 bytes
font_01_sfnt_off0000f5c0.bin
9d2521c7bbc32ebeadc9bf6a8d54dee08dd14315634e32e5a3086303668ec092		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 10748 bytes

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