Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfefcba37240d2d…

MALICIOUS

PDF

71.3 KB Created: 2021-03-15 04:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec753c3d60e98b0dc9d45105de186d4 SHA-1: 7a81a74db561cc49396d30d064c930ceb44303e7 SHA-256: ebfefcba37240d2deb345ea5f9fd79ff77714c4d3e631b2293c0e440d9615105
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that is presented as a 'power amp repair guide', likely a lure to trick users into visiting a malicious site. The presence of embedded URLs and the nature of the detection suggest it is used for phishing or malware distribution.

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://dafemum.ru/123?utm_term=power+amp+repair+guide
    • http://xaxemejidaxetov.iblogger.org/32999091778.pdf
    • http://tuderoba.getenjoyment.net/73004299354.pdf
    • http://kevaduvapagenig.iblogger.org/33450387917.pdf
    • http://tonipoj.iblogger.org/riboxaz.pdf
    • https://cdn.sqhk.co/xikokopek/50gc9yp/xamawod.pdf
    • https://cdn.sqhk.co/salulilo/bhfMjBx/beyonce_beautiful_liar.pdf
    • http://wegoluxetas.scienceontheweb.net/nlp_sleight_of_mouth_patterns.pdf
    • http://tifowarevonet.iblogger.org/60389317306.pdf
    • http://xofitazuregokud.mywebcommunity.org/titogufutojatugipi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1c0525ad-74e3-41c7-b44a-ab8be2d0a3fb.filesusr.com/ugd/be19e1_791b5437f49b4c10a41b447382ca31a7.pdf?index=true
    • https://s3.amazonaws.com/ladojenefe/new_english_album_songs_free.pdf
    • https://s3.amazonaws.com/nasitevu/46250507197.pdf
    • http://sitidex.epizy.com/mambo_number_5_trombone_sheet_music.pdf
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_2492aa920b28429e90ee3721eda7f1fc.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_d184b0e72c3444fa9f01870b29e0e00b.pdf?index=true
    • https://s3.amazonaws.com/ganubatebedoxez/occurrence_book_template.pdf
    • https://s3.amazonaws.com/zamemigojat/what_is_curriculum_compacting.pdf
    • https://s3.amazonaws.com/vuforewebub/77451124738.pdf
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_f3b64391e25148bdab8fdb48df82c414.pdf?index=true
    • https://s3.amazonaws.com/kisimujuk/13075571771.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_off0000da79.bin
c9f8fcae2156e726fd73e8c28c20112be084e52e0d0ee6add78efc7515ceb5bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 5160 bytes
font_01_sfnt_off0000ec02.bin
6c6c126fb49fd4b60b1cbac7735bf79dfa4f8392f57dcf886f2fdb389660403a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10604 bytes