Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd553513232cee7…

MALICIOUS

PDF

227.6 KB Created: 2020-11-13 06:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 75cdca7700fd81164026a05beb61239c SHA-1: 5269eeeea0f52a387e712350343cef15813eccef SHA-256: bcd553513232cee7b60f082c20d839405b3746f18a877f002b6ba18fd98946de
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI pointing to 'trafficel.ru' combined with heuristic firings for 'Urgency / deadline lure' suggests a phishing attempt or a lure to download a secondary payload. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/aws?utm_term=osteomyelitis+guidelines+idsa PDF link annotation
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/6110118.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/dusuwesodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f88e80c57364.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f918ef3604ed.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/7096377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_5fa25417e78d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f96b6c01a2c3.pdfIn PDF document text
    • https://gebopudexor.weebly.com/uploads/1/3/4/4/134482947/500803fd8a2cb49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23943cc-06b2-4906-9c92-3a80b24c1bd8/casese_quien_pueda_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69744bbb-db15-4e78-9f62-a28d2e731caa/arrested_development_pilot_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0994cb38-e015-453e-974f-8d7cd388db04/93230056866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d3f1fa-dfcb-480c-b751-f391eb623876/kasafonoguzajonam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82579e0-0162-4e5e-86b4-1b7d6dc3c021/13747676128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f822ca8a-2b29-4688-ba71-af5fc4c28116/sojatoxelekuvijogel.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_off00033d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D87 5176 bytes
SHA-256: b74f9f495204954468d753d19adaacce04fc41ae4ff99cdceec2a1c0531c31ca
font_01_sfnt_off00034f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34F14 15244 bytes
SHA-256: 343211fb8b46ac6ed9db3bdaa885cefe30de5248621930a5a5caa811a887b723

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