Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d3fa67bab3dfb7…

MALICIOUS

PDF

105.2 KB Created: 2021-02-15 23:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f0e6c36ab8ac8fcb4e16713198e0208e SHA-1: 31885224e94a1fa457e73724ccdc503d3783c549 SHA-256: 53d3fa67bab3dfb7602d137727b456c2870b5044ce9226d0347b80e1e8361932
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and a visual download button suggests a phishing or social engineering attack aimed at tricking the user into downloading a payload. No scripts were extracted, but the PDF structure and embedded URLs are strong indicators of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=how+much+does+a+hedge+fund+manager+make PDF link annotation
    • https://menaminalopu.weebly.com/uploads/1/3/5/3/135318725/0495baa09.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/pofed-lovevav-tomelosok.pdfIn PDF document text
    • http://jitufar.22web.org/13693121437.pdfIn PDF document text
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/7125918.pdfIn PDF document text
    • http://ratonawe.iblogger.org/bawigikasep.pdfIn PDF document text
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/vadoziwozedu.pdfIn PDF document text
    • https://xanalefude.weebly.com/uploads/1/3/1/4/131411596/wuwopuvugigavu-fovixof-pudazigezewiju-lutiru.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/1b9b8d0f5c8b3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/rejesaliwalasefajiviji.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/boragame.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/754619949.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/dnd_character_sheet_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/dubojewitowosusukimiduxo.pdfIn PDF document text
    • http://bojonovaja.rf.gd/3ds_max_2016_crack_xforce_free.pdfIn PDF document text
    • http://vuriruzuminomu.epizy.com/85215805178.pdfIn PDF document text
    • http://nobuxuka.epizy.com/36761379495.pdfIn PDF document text
    • http://gozudivigel.epizy.com/65507803339.pdfIn PDF document text
    • http://magotabitujotu.rf.gd/60693227863.pdfIn PDF document text
    • http://budivisatenebo.rf.gd/5716046183.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/verbs_in_present_tense_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C99 5520 bytes
SHA-256: dfa3923723b0b022b7a5444b9a3a7b719f916c296d855dbaa918c65932396c69
font_01_sfnt_off00016f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F46 11816 bytes
SHA-256: a3c5a985cdcac3396105463fab57b0c41cc1f7db001b1317aee9835158904223

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