Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee52da94dc93ca1b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-30 03:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 484272b614aefd0a9790acd9f3e52b85 SHA-1: 2648118cf59f998990cbe37efeeec83c17ba9dfa SHA-256: ee52da94dc93ca1b2dfdf6b7d75e22a29ff42a26b1a5befa4ac054fc31331c32
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users by presenting a lure related to educational materials.

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://kuzutuzo.ru/aws?utm_term=usmle-rx+-+first+aid+step+1+express+video+2013
    • https://cdn.sqhk.co/tarolaser/Sjcjcdm/didagamifefawosagepatuv.pdf
    • https://cdn.sqhk.co/sofedelabo/FKaFji8/leica_m6_user_guide.pdf
    • http://lujakivuvig.22web.org/neville_goddard_books.pdf
    • https://cdn.sqhk.co/kotolodegag/citPhb2/95435681882.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b785c1f1-dd2e-43b7-a613-fb99cadb5c38/99375832757.pdf
    • http://tovujopojat.epizy.com/android_market_for_samsung_gt-_s5360.pdf
    • http://deseruti.rf.gd/fekanilezubi.pdf
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_f4910d07153347ac8bf24a556cf255d8.pdf?index=true
    • http://dupuxup.rf.gd/oregon_dmv_accident_report.pdf
    • https://s3.amazonaws.com/jotogorurekuro/asclepiadaceae_family.pdf
    • https://uploads.strikinglycdn.com/files/941c4f05-1b71-4cd7-a72c-e24ceb2c9e69/58350791357.pdf
    • http://japusorusepex.rf.gd/bombas_hidraulicas_de_paletas_parker.pdf
    • http://bedipate.epizy.com/14954682907.pdf
    • https://s3.amazonaws.com/mozedijiz/final_written_warning_template_south_africa.pdf
    • https://uploads.strikinglycdn.com/files/28cc0390-4d03-4dcb-b949-1d128550211d/what_to_do_after_death_in_islam.pdf
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_4dae810dab5e40de8f7b71bf98213b52.pdf?index=true
    • http://suvemavukefejig.epizy.com/porutawigafut.pdf
    • http://bokatonopax.epizy.com/feliz_navidad_lyrics_in_english_song.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a1.bin
b0711aa15488df44eb0822accde7ff8520fd0c2346876dcaea2c5adf35c40b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 5828 bytes
font_01_sfnt_off00010a7c.bin
bc1d4e17840a37e35925f3db46afe7f303928064b7fa59184738fa3146e42e20
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 11952 bytes