Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7e11b5926c0522…

MALICIOUS

PDF

95.1 KB Created: 2021-04-15 04:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e42e84a2acf4161e9456f1fd5edfcd15 SHA-1: 716b40d4c3f32e062328bfb42b23eecd46382d1e SHA-256: cd7e11b5926c0522fd4fb18fffebcb787f0e7ec17d4ac6800b4b7e57a79c53ab
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, likely serving a malicious payload or phishing content. The document body, though heavily obfuscated, contains references to 'Neil degrasse tyson masterclass free reddit', suggesting a lure to attract users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=neil+degrasse+tyson+masterclass+free+reddit
    • https://cdn-cms.f-static.net/uploads/4406787/normal_605891d4e2926.pdf
    • https://cdn.sqhk.co/fuxilumevo/gecjefp/pawelawixelenixowuli.pdf
    • https://static.s123-cdn-static.com/uploads/4401518/normal_5fcc0b7c5e1d8.pdf
    • https://cdn.sqhk.co/numiwuzuwix/cZElm1g/defefagokapajozomufenow.pdf
    • http://mejumafegebameg.mygamesonline.org/blender_car_modeling_tutorial.pdf
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5fcbd0fe8f05c.pdf
    • http://talajudoxuxip.mygamesonline.org/bessel_interpolation_formula_derivation.pdf
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fd710e9b7cd2.pdf
    • http://zuregazezoral.mygamesonline.org/four_veronica_roth_free_download.pdf
    • https://cdn.sqhk.co/wulupumiwi/ylbqje5/935784821.pdf
    • http://bumasujofoj.getenjoyment.net/the_real_lincoln_review.pdf
    • https://static.s123-cdn-static.com/uploads/4380545/normal_6004a8de04013.pdf
    • http://vodabutopidaru.getenjoyment.net/t2_ankle_arthrodesis_nail.pdf
    • https://cdn.sqhk.co/rapowipijes/iblgeWy/zombie_2_movie_songs.pdf
    • http://kewatupu.scienceontheweb.net/bilge_oil_water_separator_project.pdf
    • https://static.s123-cdn-static.com/uploads/4368772/normal_5fe2cb84b6e41.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_600ff964f0229.pdf
    • https://cdn-cms.f-static.net/uploads/4469145/normal_6024799c290d1.pdf
    • https://cdn.sqhk.co/vujenibolo/ejhghhj/62560852562.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fajazimigig.atwebpages.com/what_are_the_qualities_of_a_bad_husband.pdf
    • https://s3.amazonaws.com/polojuliragam/16824480046.pdf
    • https://s3.amazonaws.com/rutufokedizon/history_alive_textbook_6th_grade.pdf
    • http://pasulupumorowim.myartsonline.com/kabilaxuxolefumesobow.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_off00013557.bin
def4db21ccc448a1983d8319c7c20780066b53fc5d255cc1e26e71d94242cfd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13557 5412 bytes
font_01_sfnt_off000147b8.bin
b850c21ca1f6bed98d214bf1e9ea030d2fb052aed39c1ef73552fd6f9ac4bedc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147B8 11528 bytes

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