Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7040f3a755dddb…

MALICIOUS

PDF

69.4 KB Created: 2021-04-02 19:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cc2e0d3fdb0b596d9194cbb79ccba38 SHA-1: b0af43508d93de406cd4cc27a7e2ff900a1f3fcb SHA-256: 4e7040f3a755dddb3f29925b1a5f28132cdb2f99340f83074955d7be73df7db7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and ClamAV detection indicates it is a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'gingivitis associated with bacterial plaque pdf'. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=gingivitis+asociada+a+placa+bacteriana+pdf
    • http://naturebiolog.space/garodnnwiu.pdf
    • http://abanca-electronica.com/momekezodavipofozilbj43j.pdf
    • http://jumovuv.22web.org/compress_mac_free.pdf
    • http://216tilford.com/prec12_rational_functions_worksheet_answersudowg.pdf
    • http://legendbilisim.com/livro_pneumologia_downloadszod6.pdf
    • http://zixivudu.getenjoyment.net/becoming_michelle_obama_ting_vit.pdf
    • https://cdn.sqhk.co/disumuneriva/jegegi8/kukaboguvogexixepumo.pdf
    • https://cdn.sqhk.co/pusuvizodez/cjgjchb/81428546045.pdf
    • http://boldly-grow.com/mercury_15_hp_4_stroke_service_manual8sd90.pdf
    • http://vifezitenof.getenjoyment.net/fusionner_2_fichiers_en_un_seul_mac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/patilawasu/internet_explorer_browser_for_windows_8._1.pdf
    • https://a2d069cd-1a24-4ef9-b252-3667b96e00b1.filesusr.com/ugd/1d3654_0a479cdec59942b0ba1c5826815886d3.pdf?index=true
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_1fc5c4f9862840b285a98ff84b79a050.pdf?index=true
    • http://davafegi.epizy.com/suvow.pdf
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_4f9378d170324b37ae42ab7008e0eb51.pdf?index=true
    • http://kileduf.epizy.com/centos_7_admin_guide.pdf
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_4f57c9df77c944f1b7a3fa9478896afb.pdf?index=true
    • https://s3.amazonaws.com/luxaduzimase/55589990526.pdf
    • https://s3.amazonaws.com/getizar/bowepaganid.pdf
    • https://s3.amazonaws.com/xukanomarexumu/4357325083.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_a3adf0ee4afd4557ad38c3b228838188.pdf?index=true
    • http://bilexijo.rf.gd/gifivepevepoj.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_off0000cf80.bin
cfae9703867ec4ea600f9fe34d9662286995e5afa3ba18a36c923521f7610c3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF80 5552 bytes
font_01_sfnt_off0000e27c.bin
efe5cbd06fd0c47c949495169504e1a5b3a628ce8e58987861251015dc409cad
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 10944 bytes