Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ee87de1a2d608c…

MALICIOUS

PDF

87.2 KB Created: 2021-03-13 19:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d64aa7b45a64770f57720f1fe3ebf8 SHA-1: e0af5490b094d2a1f4114eeb7474084925f85e6e SHA-256: f7ee87de1a2d608c16cb9ff360f6ddcde2738132b4595b679dcd20577b1c12b5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://xezojetit.ru/award?keyword=dictionary+oxford+pdf', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains strings related to 'dictionary oxford pdf' and 'wkhtmltopdf', indicating a potential attempt to disguise malicious content as a legitimate document. No scripts were extracted, but the presence of external URLs and high heuristic scores strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://xezojetit.ru/award?keyword=dictionary+oxford+pdf
    • http://psychologyrelax.xyz/vikings_war_of_clans_defense_strategy79ezz.pdf
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5fd620dda4893.pdf
    • http://digitalcalakk1.xyz/ganekamibekotagadiph47n.pdf
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6025ae3fb38a2.pdf
    • https://cdn-cms.f-static.net/uploads/4462035/normal_6021d0c33e6aa.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fef97bc7e863.pdf
    • http://tells.fun/jeteweporeztzoz7.pdf
    • http://detonic-official.website/zuposenoruzaafmry.pdf
    • http://gratoramaa.website/fufefararitiminijonipiocike.pdf
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5ffa8b66f0ac9.pdf
    • http://stc-l.ru/51325447019xm16u.pdf
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fea3d1d57e51.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_6016c436e1b1f.pdf
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fd2a5b8e763f.pdf
    • http://cethq.xyz/reinforced_concrete_council_design_spreadsheet_free_downloaduy5jt.pdf
    • https://cdn-cms.f-static.net/uploads/4530457/normal_603a6d13b8276.pdf
    • https://cdn-cms.f-static.net/uploads/4490724/normal_6027fe437f14c.pdf
    • http://topvideo.design/tom_clancy_books_without_jack_ryan_jr_seriesftoql.pdf
    • http://construt.site/11984524209ydzui.pdf
    • https://cdn-cms.f-static.net/uploads/4465707/normal_601a03fcaa709.pdf
    • http://freshka.fun/genuine_samsung_galaxy_s9_charger_cablebe9lf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fepoxojosatomu.epizy.com/free_microsoft_publisher_event_flyer_templates.pdf
    • http://xopemaw.rf.gd/1901829727.pdf
    • http://dowinoxerirud.epizy.com/how_to_create_process_flow_chart_in_powerpoint.pdf
    • http://puwodadivuxasaf.epizy.com/embroidery_designs_to.pdf
    • http://notijopozij.epizy.com/dotefux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e0.bin
51f171feee9887b20ace1ef92d241d21987e9a5c8b75a6088b0669fc42738202		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 4776 bytes
font_01_sfnt_off0001022e.bin
560c588a0c76df350acc6749d20bf238e3c7b2a846177cd5905a31347dd315d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 11396 bytes
font_02_sfnt_off00012911.bin
8d45f5f417e74c11d54eaee7138901bb4b2498e40dea16ccf89f2c2707c13e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12911 16544 bytes
font_03_sfnt_off00013f55.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F55 4324 bytes

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