Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6758b205e472aa…

MALICIOUS

PDF

81.7 KB Created: 2021-03-24 22:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5daf861c9b4675836d010007d5399580 SHA-1: d188f7b41ccd701f0c5734cddeda4afc5d3b06e1 SHA-256: ac6758b205e472aae07885d90c3afb4156efdca1fe84e1806457e5388505bb34
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, 'ponafet.ru'. This domain is associated with a lure related to academic papers, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of the external URI is a primary indicator of compromise.

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://ponafet.ru/award?keyword=cambridge+secondary+checkpoint+past+papers+science+pdf
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60158c0f5b237.pdf
    • https://static.s123-cdn-static.com/uploads/4481663/normal_60011a98c633c.pdf
    • https://cdn-cms.f-static.net/uploads/4427097/normal_60435d687b87c.pdf
    • http://bukenisefino.mygamesonline.org/logunemexepodadevel.pdf
    • https://cdn-cms.f-static.net/uploads/4416927/normal_601fcf0b427b3.pdf
    • https://cdn-cms.f-static.net/uploads/4496824/normal_601675f376cc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://givinedefadedi.rf.gd/organizational_culture_and_leadership_schein_1992.pdf
    • http://losotejusegiso.rf.gd/dunkin_donuts_nutrition_french_vanilla_iced_coffee.pdf
    • http://lepefefila.epizy.com/12268043899.pdf
    • https://uploads.strikinglycdn.com/files/00ac95fc-f059-425f-b651-4359e6a3ac2d/xomapu.pdf
    • http://foxinojale.epizy.com/aadhaar_update_form_gujarati.pdf
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_a106c392244445b9ae010bbd4ded684f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/de7d3d03-4bdb-4f4d-952a-f084f0585311/how_to_interpret_mbti_results.pdf
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_aa4252a9d6834b2182b1f1bbacd7dbd6.pdf?index=true
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_8b7065bc20db4e72b3e03af799b14346.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c04113d-8962-42bd-8b6d-a688d3ebe1ae/fokaxadidojora.pdf
    • http://ditanumugagoma.myartsonline.com/74085070277.pdf
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_72410cd126034b56b88200ee325beebf.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e874.bin
6090a7ddaa253619907bae60fe377194978ad78cba11abc3f114b381d69f9410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 5748 bytes
font_01_sfnt_off0000fbd7.bin
120d06a19fd68d1c231c16fe5a09fdb60d44b6c449126bca3549e5dc015099a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 11320 bytes
font_02_sfnt_off0001222f.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 16164 bytes

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