Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e91524b7c2552ba…

MALICIOUS

PDF

83.0 KB Created: 2021-04-05 05:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d7ea1e56b7563162dbb4dee28fd1e8 SHA-1: 5d736ff4b300accd39633b61a56f7a8a00997044 SHA-256: 3e91524b7c2552ba1dc2e2cf7d2673e92209edfb86e4edafaa7490e3b671f59a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as a payment redirection lure. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or trick users into visiting a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/award?keyword=outfox+sandra+brown+pdf
    • http://adanakebap.org/adobe_acrobat_pro_for_maci7hkq.pdf
    • http://forpost-electrica.ru/nitecore_i2_how_to_usehm5mn.pdf
    • https://static.s123-cdn-static.com/uploads/4487662/normal_6003267204761.pdf
    • http://fitdieta.com/weber_spirit_ii_e-310_assembly_guidejkord.pdf
    • https://cdn-cms.f-static.net/uploads/4471273/normal_6066dd9f0e747.pdf
    • http://zavodtriumf.com/how_to_dye_hair_evenly_with_rootsbin8d.pdf
    • http://copyrightnotices-form.com/beats_solo_pro_colorsv5x9y.pdf
    • https://cdn-cms.f-static.net/uploads/4408340/normal_6050a91e51fba.pdf
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd192052e772.pdf
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6028b1dbdebb0.pdf
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ffbfe18cdbd6.pdf
    • http://artrosil.xyz/wovusuloxazinezar6w3j.pdf
    • http://matepiruzozu.iblogger.org/fenotefetujegiwilel.pdf
    • http://rubisteq.online/82811501262w1ca9.pdf
    • http://rujibobisurixu.iblogger.org/buddha_meditation_techniques.pdf
    • http://vigastlens.xyz/lisp_file_for_autocadvwy6p.pdf
    • https://cdn-cms.f-static.net/uploads/4427103/normal_6062d89fc5e63.pdf
    • http://wonder-ita.space/green_party_candidate_platformpga9i.pdf
    • https://static.s123-cdn-static.com/uploads/4494661/normal_60049bbbe5610.pdf
    • https://cdn-cms.f-static.net/uploads/4383165/normal_603b054fb9593.pdf
    • https://cdn-cms.f-static.net/uploads/4426547/normal_603ac4cbc7ab7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://poruworetizilu.epizy.com/cellule_vegetale_cours.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa47.bin
d9e41b4535b74f7ebde40b3907c72b9c2a9a4e3a7f41099438c3ccb46b30aee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 5048 bytes
font_01_sfnt_off00010b7d.bin
65822f7fa4a3f8b2d493fee11be3bd597dd2cc683a7f527695ebf06f68a17c41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10948 bytes
font_02_sfnt_off000130b5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 4324 bytes

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