Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef2019ce305ae9b…

MALICIOUS

PDF

68.1 KB Created: 2020-12-16 22:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ef93d065a6df4ae90de7f1d766d16e6e SHA-1: 7fac7e2c3dfe7ae6f6d4e59b0e8fc117ee3d4231 SHA-256: bef2019ce305ae9bcddc605cac81b4ad1cf1a8151d631907d07e9aaf9d146226
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a critical finding of a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or malware distribution attempt. The embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=what+is+an+rsp+teacher In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5fca3748e6f6b.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/01b5d357d5526.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://nuwuzeparagagux.weebly.com/uploads/1/3/4/8/134883197/fdee82fa3631.pdfIn PDF document text
    • https://giwonogudere.weebly.com/uploads/1/3/4/8/134872327/numuwiruk-xowijewijula-zegewubav.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/tibuxo-logeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5fab1c293e0bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/99132848013.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/93641089518.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/lilefolaxowokevudapatimug.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/chaffoteaux_britony_water_heater_manual.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_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 5004 bytes
SHA-256: 3d1ef2c76d6359debbfebc2009fd300a07d6b05287fc33a4b2b6b3899a4ef740
font_01_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 10872 bytes
SHA-256: 789fe8fc32d6750ebf4cdbfb740f26c77e8d402a12b410c020296e152a80e4c9

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