Malicious PDF — malware analysis report

Static analysis result for SHA-256 036bbf8cce325256…

MALICIOUS

PDF

180.1 KB Created: 2021-02-24 09:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8169f98869106bf4b12c75b421c16ae3 SHA-1: 73182825328fe39cc917e8bc3eb7776992bba8a2 SHA-256: 036bbf8cce32525645fce2d70d465cda72239373947ae0daa9b0b802bd7aeeb7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=which+came+first+christianity+or+judaism In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_600e0f6852a4d.pdfIn PDF document text
    • http://kuwibixavuxo.iblogger.org/causative_have_and_get_exercise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374372/normal_600493259a920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_60099a570fc73.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/3882540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5fdc53621ad68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd2d1f9b37b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fcaa73338a45.pdfIn PDF document text
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/pokumuje_narajev_zumelobodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_600ec26d262c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_60024c1d7a475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_6022aa372bcc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459318/normal_5fedab42cb4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_602d870b35eab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fec03458d9cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakogajoxe.epizy.com/ledoligowe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000266a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x266A3 5420 bytes
SHA-256: dcf8e9432763c68a9d903be9add87602941051d01166f9dc834d6a594abcc674
font_01_sfnt_off00027901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27901 14732 bytes
SHA-256: b2e3d9606a9d6963d946dd604beb2493417b021427c3fad8e609182a1a9893d2
font_02_sfnt_off0002a648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A648 17992 bytes
SHA-256: 986e2208150e2e40429121c223aab23689fcf0afa57d6f8906510681e1c79e6c

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