Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e3f1f7d37dbe04…

MALICIOUS

PDF

78.9 KB Created: 2021-03-14 03:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 203a08fb9c448e8d760b097ce69d0381 SHA-1: 189275486f9bfc0ddad6a083439aeb3bf21cb76c SHA-256: 35e3f1f7d37dbe04e12a6ca7161796452468f475668f955f923ac69bdf7e0bee
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple detection engines, including a machine learning classifier and ClamAV, indicating malicious intent. The embedded URL, 'https://jacksth.ru/strik?utm_term=no+rest+for+the+wicked+kingdom+come', is the primary indicator of compromise, likely leading to a phishing or malware download site. No scripts were extracted, but the PDF structure and external URL suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=no+rest+for+the+wicked+kingdom+come
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5ff0b14e34eae.pdf
    • https://cdn-cms.f-static.net/uploads/4471240/normal_5fe7a591e9571.pdf
    • https://busununivid.weebly.com/uploads/1/3/4/7/134774072/3783682.pdf
    • http://dizititakozazi.mywebcommunity.org/96181866931.pdf
    • https://cdn-cms.f-static.net/uploads/4374517/normal_601a1c84c9093.pdf
    • https://cdn.sqhk.co/budatumibowu/QELhdFs/vuban.pdf
    • http://nenegifivujaxu.mypressonline.com/pride_and_prejudice_free_movie.pdf
    • https://lokabema.weebly.com/uploads/1/3/4/1/134109183/144eb9b.pdf
    • https://static.s123-cdn-static.com/uploads/4391642/normal_600582535c33b.pdf
    • http://bafezixulu.22web.org/46123388883.pdf
    • https://cdn.sqhk.co/tajudozizif/aAvZjeG/30066111214.pdf
    • https://static.s123-cdn-static.com/uploads/4428038/normal_5fe5fad76a888.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xenilesaripesu.epizy.com/apc_ups_750va.pdf
    • https://s3.amazonaws.com/zamuriza/bellino_fine_linens_hotel_collection_sheets.pdf
    • http://begujewirefe.myartsonline.com/watapepiwop.pdf
    • https://s3.amazonaws.com/dewutexorob/16451117331.pdf
    • https://s3.amazonaws.com/godewumazek/15666693549.pdf
    • http://vexabimumemig.atwebpages.com/tratamiento_balanitis_candidisica.pdf
    • http://xofogijatoli.epizy.com/ark_survival_evolved_structures_plus_mod.pdf
    • http://vovijez.epizy.com/vovuk.pdf
    • https://s3.amazonaws.com/savukojubusum/15523097483.pdf
    • http://fipotunisobojow.epizy.com/how_to_check_a_dryer_switch.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_off0000f5f6.bin
1bdfe4aeae02159aff14b69f03597eb3fc683643ba1a8f9f8fa39323ddabc38a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5320 bytes
font_01_sfnt_off00010803.bin
76e91f355228bcc92120137e3b5072f04d428f658d3b5fccb06c2bf2690e530c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 10864 bytes