Malicious PDF — malware analysis report

Static analysis result for SHA-256 1752141f3aa6afcd…

MALICIOUS

PDF

70.7 KB Created: 2021-02-27 21:34:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 937d509d3fac7a4e000b918b7b0fb9b1 SHA-1: ff3110581211fa5a099f139b19b0e99b8b33b36e SHA-256: 1752141f3aa6afcd876816372a678418186613640cdbda9b6b107cac91401423
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://vilenefex.ru/aws?utm_term=ipod+mini+replacement, is likely used to deliver a secondary payload or redirect the user to a phishing site.

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://vilenefex.ru/aws?utm_term=ipod+mini+replacement PDF link annotation
    • https://cdn.sqhk.co/rerunaropiz/e7Shezn/12948741734.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/bxzighh/jugufobekutezazekeb.pdfIn PDF document text
    • http://klokisik.space/244418050259nsn6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_603340ca618ff.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/dhjia2u/flip_water_bottle_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/jYhhTig/pew_pew_guru_villa_park.pdfIn PDF document text
    • http://stavki.link/cowboy_games_pc_free7y8ji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_600e11fd7a5ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501206/normal_5ffa5b0fc335e.pdfIn PDF document text
    • http://teaapple.space/33557864722yexyt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ratixifo/wow_warlock_classic_leveling_guide.pdfIn PDF document text
    • http://novufojanaka.epizy.com/40367116748.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/igcse_maths_revision_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/allah_ho_allah_ho_full_ringtone.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/55606477010.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/best_archery_games_android.pdfIn PDF document text
    • http://pewaxoxepizus.rf.gd/57446023788.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/15038772371.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 4764 bytes
SHA-256: e5789b6320d7d06bd65d06afa8bc4b0f7344136e96dfedc8aeb26e746982b110
font_01_sfnt_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 10096 bytes
SHA-256: 754f8bf18d22a373f2f6b0b8d59dba05d178e5416d06cfc0ad781d5b878b1002
font_02_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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