Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbead24ea77b9954…

MALICIOUS

PDF

81.3 KB Created: 2021-04-01 10:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 530810e3670dab6b0aa6f9b1d13b510d SHA-1: c35b5959a185bf47251a4d87564bdcc89c779228 SHA-256: dbead24ea77b9954a6bfa09ea60f63e637634c5575fcfebf4629063cc0eea3dd
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. It contains an embedded URL pointing to 'midufefew.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=boiler+feed+pump+in+thermal+power+plant+pdf PDF link annotation
    • http://jidugisukeranav.iblogger.org/58766569042.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/sapixekopanil.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/fdgiZMp/retro_mini_arcade_games_list.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/dZjbhgf/birisowa.pdfIn PDF document text
    • http://vetovikaxu.mypressonline.com/zixijekewuvamuwarolonuge.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/neoclassical_period_in_english_literature.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/DyBbgjv/vepuvuviboruf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_6052ede5b9bc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482219/normal_5ffe520f45917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_605f79e8b4783.pdfIn PDF document text
    • http://vorofagup.22web.org/golamazofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wefadep/how_to_use_canon_mp11dx.pdfIn PDF document text
    • http://pitefabe.epizy.com/selenium_ide_commands_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/yo_whatsapp_2019_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/barnett_rogue_crossbow_4x32_scope_package.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/96706188177.pdfIn PDF document text
    • http://legosipado.rf.gd/causes_and_effects_of_absenteeism_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/adobe_stock_indesign_templates_free.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/95524690490.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/google_maps_javascript_api_v3.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/chrono_trigger_upgrade_version_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 5244 bytes
SHA-256: d1747e0880e7ddbf4d338ca3d6df34fcfe83bb6886dd51717385a4f750c2e5ac
font_01_sfnt_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 10948 bytes
SHA-256: 26e6c80147c947797bc617e760261b5f1f866fde03f455664538239ad9df41a1

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