Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dba20a7e98058eb…

MALICIOUS

PDF

77.8 KB Created: 2021-02-25 02:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5ca2c5bab223ec8d985095c0f0817b1a SHA-1: 06038df446d6de39b87afc206805666051f9b720 SHA-256: 2dba20a7e98058eb2e2c2bef40a5461df514622534a39b0c756b30b8caf7f036
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://seumenha.ru/123?utm_term=a+you%2527re+adorable+b+you%2527re+so+beautiful+lyrics', which is likely used to download a secondary payload. The document body, though heavily obfuscated, appears to be related to song lyrics, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=a+you%2527re+adorable+b+you%2527re+so+beautiful+lyrics PDF link annotation
    • http://fevalugumaj.22web.org/twilight_full_movie_download_in_hindi_dubbed_480p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_6029dbf115179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_600bf52bd8c7c.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/63177206293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5fe7f0b9b0047.pdfIn PDF document text
    • http://erogan-columbia.site/destiny_s_child_album_artjsma0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_6024c137e215f.pdfIn PDF document text
    • http://big-ita.space/word_for_hospital_roomamk2s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasomozonomevam.rf.gd/how_to_do_stocks_and_trades.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/71438870126.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/amsco_ap_us_history_chapter_12.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/12928711292.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/memory_angielski_dla_dzieci.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/laundry_soap_sheets_uk.pdfIn PDF document text
    • http://bazejufojowopor.epizy.com/rukapuwulalagewiti.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 5280 bytes
SHA-256: 500d8147dc3d25561a113dc73f2baedad42afdb4d54c38b026c69a3a6a734361
font_01_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 12208 bytes
SHA-256: 4922dcdf7577351834340fdf833c4cdac57079b4f9bbd120e7f6e398c3c0bc7b
font_02_sfnt_off000113e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E1 16160 bytes
SHA-256: 7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce

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