Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23b6318c1ceb583…

MALICIOUS

PDF

77.4 KB Created: 2021-03-24 16:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e861b971543fb15a46d0f49b2a51460 SHA-1: 7069990d62908769139ae222f314868d60c244e9 SHA-256: f23b6318c1ceb5830921ef880898cb334472f50d5eee421e0c3ac575f9990b9a
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 URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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://dafemum.ru/award?keyword=ayurveda+cooking+for+beginners+pdf
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff42cfd9750c.pdf
    • https://cdn-cms.f-static.net/uploads/4412896/normal_60354efaaf51f.pdf
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/2550345.pdf
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/bfe7f0d.pdf
    • https://kuxokovu.weebly.com/uploads/1/3/0/7/130738635/pubavikavowi.pdf
    • http://rajizaloka.iblogger.org/financial_reporting_manual_2015.pdf
    • https://static.s123-cdn-static.com/uploads/4367299/normal_600537d49cb5c.pdf
    • https://gazulaloruvuv.weebly.com/uploads/1/3/4/6/134693071/zonuvipegexe_miwozamemago_ripetomarijog_jagetigeneb.pdf
    • https://xovixonu.weebly.com/uploads/1/3/4/8/134896571/7608271.pdf
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/bf9998cbc.pdf
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/9318991.pdf
    • https://cdn-cms.f-static.net/uploads/4380393/normal_60483d559c310.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cf4f489e-8bd0-4c03-8652-2bb308a9189e/5096393494.pdf
    • https://uploads.strikinglycdn.com/files/820d459c-a9fb-4193-8d91-a7d780cf3cdc/47695708605.pdf
    • http://wexejof.epizy.com/pijataniviregaw.pdf
    • http://ruzuzis.rf.gd/gallbladder_removal_diet.pdf
    • https://uploads.strikinglycdn.com/files/93e2948d-f846-4665-b24e-3d3a7ecb2c18/vusakuxofanenubunaz.pdf
    • http://nefaped.epizy.com/63913371487.pdf
    • http://kubuleg.rf.gd/sewakenagofi.pdf
    • https://uploads.strikinglycdn.com/files/6b3cbdd3-185a-4eaa-b589-b25447edbc0b/nitro_cloud_jpg_to_word_converter.pdf
    • http://salivokeru.epizy.com/fedejoxegubiwivorulo.pdf
    • http://xonizud.epizy.com/bimifu.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_off0000ee05.bin
5656cdb4ef4a82495a2a723ade6c1271fa57e43b8986dc94e3a6d8187a68ce7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 5648 bytes
font_01_sfnt_off00010163.bin
6ac0a66d0c185fa1c8ddc7b783da858227f17bdff8fdea9c5d65a141b8dac9d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 11484 bytes