Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3cfc35706fe589…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 01:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad48c582555b741058af57d20ab7ab2 SHA-1: d267898447275a314ffd3fcc68d016f228f9efd9 SHA-256: 1c3cfc35706fe58953b7715a0a7e53b1fd2555da6494e856a4b03c86219874d2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to chemistry, suggesting a lure to disguise the malicious intent. The presence of embedded URLs and the nature of the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=12th+chemistry+halogen+derivatives+of+alkanes+pdf
    • http://jujaxapuwuravof.iblogger.org/nefipaxavezitiripikiwu.pdf
    • https://cdn-cms.f-static.net/uploads/4474191/normal_605962097c886.pdf
    • https://cdn-cms.f-static.net/uploads/4410194/normal_606156a5b7870.pdf
    • http://jobware.pro/lajegupefogogigusejisob4r0f2.pdf
    • https://cdn-cms.f-static.net/uploads/4422137/normal_6055e1c5910d7.pdf
    • https://cdn-cms.f-static.net/uploads/4459939/normal_605a41ba18bc8.pdf
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5fd3769959b43.pdf
    • https://cdn-cms.f-static.net/uploads/4424026/normal_604a4d420723c.pdf
    • https://cdn.sqhk.co/zupodejadofe/nDiiXgc/hair_fashion_1980.pdf
    • http://chempion.coffee/physics_for_scientists_and_engineers_6th_edition_solutions90y85.pdf
    • https://cdn.sqhk.co/xumesapaxoku/MABjeih/kiki_s_delivery_service_english_cast.pdf
    • https://cdn-cms.f-static.net/uploads/4474475/normal_606141cdc89ba.pdf
    • http://copyright-notice-ig.com/trimble_access_sync_download91eja.pdf
    • https://cdn.sqhk.co/fivuwunar/6jjgija/bed_sheet_set_king_single.pdf
    • http://idealica-ituficiale.website/fefekaxedotinufirigunames39owz.pdf
    • http://faporivifavavep.22web.org/12692031046.pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fd12a5b120b0.pdf
    • http://meetsalon.xyz/qsc_k12_speakers_1000wbfotq.pdf
    • http://cmbespaceclient.xyz/23024964504gchs.pdf
    • http://novonet.online/tunufewenifanerojexeluzodko.pdf
    • http://zarabatyivat.ru/mahabharata_in_kannada_languageot0wh.pdf
    • https://cdn.sqhk.co/mesodimeduje/524gegi/kindergarten_worksheets_tracing_alphabet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ketanuviz.epizy.com/jukirigev.pdf
    • http://jekalabol.epizy.com/how_to_write_e_in_hieroglyphics.pdf
    • http://zukewanika.rf.gd/dunoboxetu.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_off0000eb74.bin
c1c0a98951d6c64931557915493dabc8cab2ed7ce665f155068e27af682d7053		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 5884 bytes
font_01_sfnt_off0000ff6d.bin
1f519f9d4c4671b115ea95d26cef21371b017be97313868afca44a36a9ad82f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 11116 bytes

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