Malicious PDF — malware analysis report

Static analysis result for SHA-256 04326024f50d5f0f…

MALICIOUS

PDF

47.7 KB Created: 2020-11-08 09:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d9d6ec59daba078330c0acbe53b0dbb SHA-1: d74fcbbe5d1a07f48e548bd1a02970864083ec41 SHA-256: 04326024f50d5f0f2fa196af7bff506061b8ce7e13ea7fb39766f30c2f680f8e
94 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. This suggests the primary goal is to trick the user into navigating to a compromised site, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/123?keyword=avast+secureline+license+file
    • https://vimikipemaw.weebly.com/uploads/1/3/4/3/134331773/9301656.pdf
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/jopevakije.pdf
    • https://roxexiku.weebly.com/uploads/1/3/4/4/134445291/magewixa_jaride_jununolipib_jerekena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dcff3578-b29d-4104-9d79-ec4362bd52ce/stokes_theorem_examples_spherical_coordinates.pdf
    • https://s3.amazonaws.com/sifawekujiki/79030596993.pdf
    • https://uploads.strikinglycdn.com/files/ab20c059-f038-4eca-8592-76f332841f39/rorewajiradeluzozidonafo.pdf
    • https://s3.amazonaws.com/dumupa/rhythm_rhyme_results_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/55788df1-2d35-4ec2-8be2-7d19d88cd633/mcat_books_reddit.pdf
    • https://uploads.strikinglycdn.com/files/e3a098ef-3718-4190-9eed-23a291a6759e/reglamentos_del_basquetbol.pdf
    • https://uploads.strikinglycdn.com/files/05670445-e17e-4b96-96dd-d28c5c9f5cd6/pewubisogevilufoz.pdf
    • https://uploads.strikinglycdn.com/files/e34e4142-a3ad-4571-9454-10ddc6d16aa2/681537245.pdf
    • https://uploads.strikinglycdn.com/files/08b06ccb-1e8f-4011-92f5-b448ab073808/mexakajemu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c6.bin
f005346ece3f7683a7f67767f9451764feab88f44c3e2f1a2fa95e34eeae86b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 4924 bytes
font_01_sfnt_off0000799c.bin
ebda8148229a19010fa704b52f1d90ee175725448f1106f711463c5f46a76b34
pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 10316 bytes
font_02_sfnt_off00009ceb.bin
e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEB 16068 bytes