Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e48a7659c4952a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-28 12:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4b7ba30c9c55c37e552dbae662fd73 SHA-1: 7acb629eeaca441514e4a4d7e50a4f671569cd68 SHA-256: 44e48a7659c4952aa23bc6d0c7573350abd9539b6959c275848bbb9429d07938
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or a second-stage payload. The document body is heavily obfuscated, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

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://soxebez.ru/award?keyword=lean+construction+alarcon+pdf
    • http://sodaapp.pro/xiralozakifulixz0joj.pdf
    • http://vittorguxx.site/98210146926l9ohz.pdf
    • https://cdn-cms.f-static.net/uploads/4379852/normal_602f814080c7b.pdf
    • http://secureappeal.com/wiloretajovecmied.pdf
    • https://cdn.sqhk.co/pevejotomoma/hidpDLc/marxist_socialism_vs_utopian_socialism.pdf
    • http://chestlune.online/navy_type_3_uniform_boot_regulationsno9b2.pdf
    • https://cdn-cms.f-static.net/uploads/4487905/normal_5fd1725cc9758.pdf
    • http://bopugafuwu.scienceontheweb.net/towoluzedude.pdf
    • https://cdn-cms.f-static.net/uploads/4388426/normal_605aced7c7c99.pdf
    • http://pobunav.sportsontheweb.net/91637129193.pdf
    • https://cdn.sqhk.co/bidusowo/Rijajij/lynx_lake_campground_phone_number.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_87c7d89f90024311a9ff1dd26740ee87.pdf?index=true
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_1233a1d205f34142b5ce33f88efff156.pdf?index=true
    • https://s3.amazonaws.com/paxunu/22061776348.pdf
    • http://dakafatuvuguviz.atwebpages.com/master_cleanse_file.pdf
    • http://kadoxosin.atwebpages.com/bokizusulivukun.pdf
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_8cbd31040c044210b96e8e5379f8ee97.pdf?index=true
    • https://s3.amazonaws.com/vuliwisuwig/lelerafitefovopekig.pdf
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_d70318d6efb5422186288908c1891b89.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_off0000e690.bin
ea283ec5fa61ac969b2b5345ba267837634bffdb823c367fd002bfe14fbb0636
pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 5092 bytes
font_01_sfnt_off0000f7f2.bin
a044b9e560a38e0569148634521e1eaccd63ba4599332b69a948f562546dee00
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 13104 bytes