Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74e18f0aab284c8…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 07:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da004bac4e1bcdf1219a8f8a51e3b85 SHA-1: 63beace3617b9e3f7e4ecf9b12aef27cf5b8c091 SHA-256: c74e18f0aab284c8dc0a49ea5a59344d6fc88387614fe524e3dac689dd64355a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including one pointing to 'nipisod.ru/award', suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9620

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://nipisod.ru/award?keyword=amartya+sen+development+as+freedom+free+pdf
    • http://ranomurivokav.22web.org/sexujikosozofekibewabu.pdf
    • https://cdn.sqhk.co/sesexibanobu/ihgg8gf/money_bag_claw_machine_near_me.pdf
    • https://cdn.sqhk.co/xasakeza/SigJiej/gisariwop.pdf
    • https://cdn-cms.f-static.net/uploads/4390052/normal_604649d68c18a.pdf
    • https://cdn.sqhk.co/jivazufevi/kA90jgj/tubing_helen_ga_prices.pdf
    • http://xevimajitufom.iblogger.org/piwuzi.pdf
    • https://cdn-cms.f-static.net/uploads/4410722/normal_604e32f0d6561.pdf
    • http://beririka.scienceontheweb.net/who_moved_my_cheese_quotes.pdf
    • http://vasetar.iblogger.org/wagner_915_power_steamer_home_depot.pdf
    • http://sevezor.scienceontheweb.net/how_to_send_score_reports_gre.pdf
    • http://zawugudumi.getenjoyment.net/3458750704.pdf
    • https://cdn.sqhk.co/wibezudak/dNeSigS/siberian_tiger_vs_grizzly_bear_size.pdf
    • https://cdn.sqhk.co/verexoleki/ehiIiiF/pigetusofokalinel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetubakuz/how_to_use_the_fill_tool_in_procreate_pocket.pdf
    • http://wedagavuvux.epizy.com/nuxodadekiwinoxo.pdf
    • http://tuxiwifu.rf.gd/beginners_guide_to_wearing_makeup.pdf
    • https://s3.amazonaws.com/lorugipopuxe/metabolism_process.pdf
    • http://mexokibalu.epizy.com/yamaha_rx_740_manual.pdf
    • https://s3.amazonaws.com/satulibaren/gutusotata.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81d.bin
4a815e1912ff20467274c3d2ec358a369a7d28fa7c402b092f10654704157b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 5340 bytes
font_01_sfnt_off00010a3b.bin
2dd327c4e94e31cdd5012373e68c4daba86141b2bf5a8f4ac4a35371e8a15b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 10556 bytes

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