Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac28fced1e6af393…

MALICIOUS

PDF

80.6 KB Created: 2021-01-26 03:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 417635420568b25fedc739b00cc0d68f SHA-1: 3c4c3e6742dec758295149081e6955d4368a3e50 SHA-256: ac28fced1e6af3938a40fbd58aefc73f5058699a95a07a0354d3da7cc3a2ec47
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffmen.ru/wb?keyword=space%20armor%202%20mod%20apk%20data In PDF document text
    • http://liolika-rsya.ru/tuzututogejimudisejvgx8.pdfIn PDF document text
    • http://prodit.space/49333664448evkwh.pdfIn PDF document text
    • http://wbigs.space/principles_of_management_book_university_of_minnesotao7u91.pdfIn PDF document text
    • http://idealica-italiauficiale.website/tipamenadeketawefupabiqgmlj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5ffb9ee58a800.pdfIn PDF document text
    • http://sait-ok.ru/50818869218se08e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421780/normal_60087c37b5399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5ff91bd9a8907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5fc793718f641.pdfIn PDF document text
    • http://mail-autoscout24.net/53286545191kmp81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwabafedazuv.epizy.com/ascii_code_table.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 2972 bytes
SHA-256: 6fab78697de8e8ad69909eb279e00a98a80e1f322d68207fc5e1117c3b5f5bd0
font_01_sfnt_off0000db33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB33 5308 bytes
SHA-256: 2b59c69031f0960b27eac16d0b3fe9888ffbaf5ddec52edb7c14d67659f66a43
font_02_sfnt_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 11584 bytes
SHA-256: 1f1d2553c853e9b8c9be546d45f933e254f9a3758e5b76d5b0418586bab17512
font_04_sfnt_off00011c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8C 16572 bytes
SHA-256: a321564a8bfeb9f93fb642bb39b529a9aa25d21f9780adcc42e62677efcbca0a

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