Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff44349bef982acb…

MALICIOUS

PDF

204.3 KB Created: 2021-03-16 11:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54e3c6c81f3c350f9a4d7f05fdb7dd5c SHA-1: 74f05bd9405de941f13eaf1e5bffae77c589302e SHA-256: ff44349bef982acb12687bbab4e7b8adf0703676c6787086acff05d96fb36113
144 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses an advance-fee scam lure, presenting content related to a digital marketing course to entice users. The embedded URL, https://nipisod.ru/strik?utm_term=best+institute+for+digital+marketing+course+in+delhi, is likely the next stage of the attack, potentially leading to credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nipisod.ru/strik?utm_term=best+institute+for+digital+marketing+course+in+delhi
    • https://cdn.sqhk.co/karadirimose/YUMahax/gmail_sign_out_of_account.pdf
    • https://cdn-cms.f-static.net/uploads/4385202/normal_6028ee4037e45.pdf
    • https://cdn.sqhk.co/lisupixiwe/ichgjiM/74530094623.pdf
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/3609985.pdf
    • http://vakugakuxux.22web.org/2016_bollywood_movies_free_hd.pdf
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/2330711.pdf
    • https://cdn.sqhk.co/temirikuji/jehic6h/shadow_of_war_arena_ai.pdf
    • https://cdn.sqhk.co/vonezositixi/xhgfhej/83765258623.pdf
    • https://cdn.sqhk.co/bisidilit/KJ27Ogg/28501967764.pdf
    • https://cdn.sqhk.co/rorajakura/fhfgfSc/95848340621.pdf
    • https://cdn.sqhk.co/matapolid/kghfPVK/texto_para_cerimonial_de_baile_de_formatura.pdf
    • https://cdn.sqhk.co/pemanunid/iiJl6gj/fruit_fancy_dress_outfits_for_adults.pdf
    • https://cdn.sqhk.co/xusozapovu/hdcgehd/ligokalidebowutot.pdf
    • https://cdn.sqhk.co/vobipibomuk/9IihkjS/cut_3d_model_for_printing.pdf
    • http://toteganutiv.66ghz.com/dowuzozixajibam.pdf
    • https://cdn-cms.f-static.net/uploads/4376849/normal_6024996d4edd6.pdf
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/lamawi.pdf
    • https://cdn.sqhk.co/gajeneset/RLigHYJ/lobikolepepiviworur.pdf
    • https://cdn-cms.f-static.net/uploads/4471514/normal_601f65096587b.pdf
    • https://cdn.sqhk.co/lanumakefu/9jjiaia/65097628688.pdf
    • https://cdn.sqhk.co/pigexebobe/giXA4K9/35744054781.pdf
    • https://cdn.sqhk.co/ziloteduxemo/meigvgi/free_music_ringtones_download_for_android.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002db2f.bin
4b9780871295fef1c1ed781635fb7836755159746c61e5ed0691ddef33747392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB2F 5432 bytes
font_01_sfnt_off0002ed77.bin
17d1cc270c22681be4d809045c6169346a5cc5beea6381c0a66caaa64dbd9539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED77 11196 bytes
font_02_sfnt_off00031398.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31398 4324 bytes

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