Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04d78b194227ef9…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 12:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ae8cbf6923591566fca73d0066fb5a SHA-1: 649c9fe4493877c9c1efff8433f863cb9bc2d810 SHA-256: a04d78b194227ef9f6d629442ad5aed4d7cd6ff51b9318f4d0cf470866a1bfcd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a malicious domain, identified by both heuristics and a ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to 'oil rig chemistry'. The presence of multiple embedded URLs indicates an attempt to redirect the user to potentially malicious content, likely 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://vilenefex.ru/wix?keyword=oil+rig+chemistry
    • http://copyrightreports.com/xitafosxntw3.pdf
    • https://cdn.sqhk.co/dedomafub/iiicgie/89139912412.pdf
    • https://cdn.sqhk.co/gosukutusu/hKgdjiU/17723012996.pdf
    • http://dabedera.mygamesonline.org/nasalubinabatokudilana.pdf
    • http://tuvoreda.scienceontheweb.net/47601162601.pdf
    • http://noxesim.iblogger.org/cache_cleaner_super_2018_apk.pdf
    • http://scotiaenlineape-personas.com/27062825074g3f5.pdf
    • http://muwawukiseka.iblogger.org/suffixes_worksheets_for_2nd_grade.pdf
    • http://bufovapafiwew.22web.org/61069349537.pdf
    • http://nigma24invest.online/63915913418arjlt.pdf
    • https://cdn.sqhk.co/fekigimuzib/3ligWib/45089347336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pujexube.epizy.com/14597775689.pdf
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_b5eb63ca4402424a8fc758d4569905ad.pdf?index=true
    • http://xobeminal.atwebpages.com/zijofekedukuxejaz.pdf
    • http://xogijowag.onlinewebshop.net/47773483117.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_0d4cbb470048464ead5136c9bd6e1e64.pdf?index=true
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_ac4f78fa3fad4fef9b80ff577ad0aad8.pdf?index=true
    • http://ledukuxadom.epizy.com/pebuzenutabudo.pdf
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_c5b8cdc2eecb400e960d65bc84db855e.pdf?index=true
    • 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_off0000f4c9.bin
73acd4d642d24994cd9c171dad610acf185c004f4d22b11509b068e75d4ab18c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5132 bytes
font_01_sfnt_off00010622.bin
7105ce3d2e7e788d6a3473dad641b85f14f347f40b1c515ed627b5b90d155f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 11192 bytes