Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95b38101abea738…

MALICIOUS

PDF

70.8 KB Created: 2021-02-02 09:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20b33a8f1eb387b0f02aa4365ebe9ab SHA-1: 5015534d0afcec86ea82b95189329bc9c1a4cca4 SHA-256: a95b38101abea738b24aba90c2795e3e0545049b36612887ff3d681e18ec16e6
116 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a lure for a crossword quiz. This URL, 'https://leonvi.ru/aws?utm_term=crossword+quiz+answers+animals+level+11', is likely intended to redirect the user to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, consistent with phishing or malware distribution.

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://leonvi.ru/aws?utm_term=crossword+quiz+answers+animals+level+11
    • https://cdn.sqhk.co/bixatavafut/UKmQ3p5/24738727400.pdf
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fd3504c56b15.pdf
    • https://cdn.sqhk.co/gazejuruni/ihUAjDZ/pico_question_nursing_examples.pdf
    • https://cdn.sqhk.co/gabisolovima/hgQgjie/sepolatorubomukusireti.pdf
    • http://lanufutado.22web.org/xudibajolexima.pdf
    • http://lujuvudav.22web.org/alexa_echo_show_5_user_manual.pdf
    • https://cdn.sqhk.co/gilitejeku/qgiiQCL/qr_code_scanner_mac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/daxemo/malij.pdf
    • http://kopivenegi.epizy.com/free_printable_goodbye_card_template.pdf
    • http://mujujum.epizy.com/dewiditarejafapenidez.pdf
    • http://volozixoxogibe.rf.gd/ambasamuthiram_ambani_song_free.pdf
    • https://s3.amazonaws.com/xafaxotaful/css_height_vh_android.pdf
    • https://s3.amazonaws.com/rovuweraja/fepujomigojepurubid.pdf
    • https://s3.amazonaws.com/lukepepe/46347723850.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_off0000d89e.bin
a5bcfad1868560ce28c324977bc7ea7dacec5f5bd9ddf2eee061f6ad2a3958a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 5256 bytes
font_01_sfnt_off0000ea83.bin
9545178c757954bb79ae7c6da7aa774f56abaa55cd0b2e60cb4a575bf6e0edf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 10344 bytes

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