Malicious PDF — malware analysis report

Static analysis result for SHA-256 9739fe1b88debd47…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 03:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ddd74a5ca63765187fc9dc45835a10 SHA-1: aff45ff2008075f02ab7ee51e4ef9896ca84fbec SHA-256: 9739fe1b88debd4704a82b068be205e68df854fa5b41161793551126eb0ae2cf
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'ponafet.ru' which is associated with a search query for downloading an Android APK. This suggests the document is part of a phishing campaign aiming to trick users into downloading potentially malicious applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/wix?keyword=the+escapist+android+apk+download
    • https://cdn.sqhk.co/tosilura/oicxhdl/fisuxe.pdf
    • https://cdn.sqhk.co/nixivezez/xSjdJje/4268986040.pdf
    • https://cdn.sqhk.co/mikevoponage/jhcmhcF/50214037989.pdf
    • http://luwogexejel.getenjoyment.net/93853880393.pdf
    • https://cdn.sqhk.co/godezixibufo/ehdkShf/24608985728.pdf
    • https://cdn.sqhk.co/totafeta/jeEjohi/60098700645.pdf
    • https://cdn.sqhk.co/vedukosamo/cdjihgf/father_daughter_drowned_crossing_rio_grande.pdf
    • https://cdn.sqhk.co/rovifatira/igiVjd2/krafteers_battle_for_survival.pdf
    • https://cdn.sqhk.co/kewukapugino/gQjdG3t/devope.pdf
    • https://cdn.sqhk.co/vakanaju/zhjdI8x/34229864002.pdf
    • http://tesevamomavuruf.22web.org/28006099202.pdf
    • https://cdn.sqhk.co/rogekanus/XjgQgjo/piriformis_function_in_hip_flexion.pdf
    • https://cdn.sqhk.co/gizoxemovefi/kjeijgh/bugomizopis.pdf
    • https://cdn.sqhk.co/jadizefon/bd26k7i/22424914117.pdf
    • https://cdn.sqhk.co/jozazixefuf/gUhaja0/tripartite_guidelines_for_reemployment_of_older_workers.pdf
    • http://pakupuxojopef.getenjoyment.net/salario_minimo_2020_decreto_lei.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xasakekom.epizy.com/86631695217.pdf
    • https://uploads.strikinglycdn.com/files/4f02b420-bccc-44f5-9279-fcb2e7a6f495/android_app_development_course_for_free.pdf
    • https://uploads.strikinglycdn.com/files/fef56178-9a6c-4587-9f2b-fec1be7dd2bd/27094370002.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e715.bin
d4ffabbe05416d9443a59823d53ed562a1ff083b0bb5effa5ab070393b8e7863
pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 5056 bytes
font_01_sfnt_off0000f840.bin
e9e81902f547ef7bfc39d97913e0fe49da6ceef2c06625e64fc3de9a328c9c17
pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 10596 bytes
font_02_sfnt_off00011c60.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 4324 bytes