Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a4b881f2bcb67b…

MALICIOUS

PDF

96.8 KB Created: 2021-03-29 07:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d726a546e297af544839f609468c51 SHA-1: 26de99fb57115c21ab0fbb1959d78e0ddebcc6af SHA-256: c7a4b881f2bcb67b1e514f87b7b9a25dcd5cd698c2481e0c4a7532fb7c852e44
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristic firings suggest the document is designed to redirect the user to a malicious site, likely for phishing or malware download.

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://pelibifir.ru/strik?utm_term=cost+of+a+994k+loader
    • https://cdn.sqhk.co/takulowizi/gghaPYD/air_attack_ads_game_free_download.pdf
    • https://cdn.sqhk.co/wudajelu/ifiLOHj/asphalt_nitro_online_mod_apk_pure.pdf
    • https://cdn.sqhk.co/kimokajuz/cSLzRgi/cubemen_2_android.pdf
    • https://cdn.sqhk.co/demejapad/h5Upfij/gujajovakifafavugu.pdf
    • http://bejisosubonito.sportsontheweb.net/16781951026.pdf
    • https://cdn.sqhk.co/sewadokoka/gip0ihO/arcade_hockey_xbox_360.pdf
    • https://cdn.sqhk.co/zefafulolit/iagdjaw/85637679802.pdf
    • http://novubelugalij.medianewsonline.com/86719293914.pdf
    • https://cdn.sqhk.co/ruzewekafan/jEsyRZb/camtasia_studio_8_crackeado_portugues.pdf
    • https://cdn.sqhk.co/sowodopevew/ZvlhhRG/lethal_performance_coupon.pdf
    • https://cdn.sqhk.co/xenudipu/hb2sieV/63808384234.pdf
    • https://cdn.sqhk.co/gesaxamadew/9jjtYhD/pathophysiology_of_bronchiectasis.pdf
    • http://nesorus.mywebcommunity.org/what_are_two_characteristics_of_figures_in_ancient_egyptian_sculpture.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dupepoge.onlinewebshop.net/challenger_deep_online.pdf
    • http://juranakowi.rf.gd/cobit_2019_implementation_guide.pdf
    • http://tenurusimuxu.epizy.com/kusajujubemofig.pdf
    • http://larafegarinev.epizy.com/21889391682.pdf
    • http://subedawulowuwo.epizy.com/fazogevodenelinafox.pdf
    • http://webidiwotew.epizy.com/horizontal_and_vertical_asymptotes_worksheet_with_answers.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001248d.bin
ced8793bf54568f8a14b4799ce186208c30e1c2f69ea30560845499958c5df68
pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 5116 bytes
font_01_sfnt_off000135ff.bin
dfa9e3a8c3e7fa29712f546ed6d8c48cfddf3f5e49ea75c95eaa40cdeda812bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x135FF 11728 bytes
font_02_sfnt_off00015e48.bin
63ea0af8218f446c6951f657c90afa72f831e8a0c9caeff0df73427b8f47130a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E48 16336 bytes