Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a7b6f30e4cf475…

MALICIOUS

PDF

88.5 KB Created: 2021-05-12 19:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b39fb53fe3338f0c7767f35a1aa6b37 SHA-1: 65527baa8dde58e1689269e7ef7e3ceb249bf8c7 SHA-256: d7a7b6f30e4cf475b30006218f43c189c4a9c98db212f969df11170a8f35e785
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely serving as a lure or redirect to a malicious payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=dark+souls+2+weapons+without+scaling
    • http://xirijapip.mypressonline.com/muxosokijefagesuwixubabo.pdf
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/muvoxov_fatusuvav.pdf
    • https://zipelademijup.weebly.com/uploads/1/3/4/0/134017001/gedixavajolagozor.pdf
    • http://potenciy.xyz/microsoft_word_shortcut_keys_in_hindi0ullu.pdf
    • http://usesol.xyz/rosojogokixozewuzu1vb0r.pdf
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdf
    • http://pifedalune.medianewsonline.com/refeturox.pdf
    • https://cdn.sqhk.co/wafudovop/haDijfn/mejusegixozebemeji.pdf
    • http://kyrgyztours.com/camera_test_chart5dsff.pdf
    • https://cdn.sqhk.co/pafevola/UhdwJdN/aashiqui_2_dialogue_ringtone.pdf
    • http://gosoxegekiri.mywebcommunity.org/3_sources_of_carbon_dioxide_in_air.pdf
    • https://cdn.sqhk.co/vedasukuki/XhfhaJC/20068028556.pdf
    • https://modizotu.weebly.com/uploads/1/3/2/7/132740501/lonebosuputexapuk.pdf
    • http://vikiduxa.mywebcommunity.org/14284047910.pdf
    • https://cdn.sqhk.co/venitalobeni/jcjfR6J/68400255043.pdf
    • http://usesalon.xyz/determination_of_biological_oxygen_demandqszq6.pdf
    • http://xagakojitogiva.getenjoyment.net/hex_cable_lugs_catalogue.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xedaripa.epizy.com/53983489610.pdf
    • http://wufagezigedo.onlinewebshop.net/nobody_mean_more_to_me_than_you_summary.pdf
    • http://digomal.epizy.com/joxijobibanizik.pdf
    • http://lukafimagog.atwebpages.com/39461439070.pdf
    • http://jikelaxapexa.onlinewebshop.net/bbc_6_minutes_english.pdf
    • http://zenadeguposu.rf.gd/91768245418.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_off00011ab9.bin
9897ce4e0017a55583a5d292e19d665f95c3270113ad1300c6e4247fd70862f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 5480 bytes
font_01_sfnt_off00012d7b.bin
eeffa02f06eaabcdcdff8b10cdb3383d4ecfbeb430c3e0840a830346f33efb4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7B 11788 bytes