Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c247776f5adf22e…

MALICIOUS

PDF

44.9 KB Created: 2020-03-22 05:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 503bb5cb8b23ddc8ffecf4fda32c263e SHA-1: 8697a62f7701c380d760833ab11960a92d592582 SHA-256: 5c247776f5adf22edbd6fb9c5f54e41f75a9fe42b619dcbebd48c61b8bf2b963
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The document body, though partially corrupted, contains a URL that aligns with the observed link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://djsacademy.com/uploads/1/3/0/4/130488415/130488415.html#ejercicios+de+adjetivos+posesivos+en+frances+resueltos
    • http://2000tractor.com/uploads/1/3/0/3/130323762/4698311.pdf
    • http://chiltonantiquecentre.com/uploads/1/3/0/2/130289236/rafobasagef-rubofapo.pdf
    • http://hitachimagicwand.us/uploads/1/3/0/6/130604511/4dda225510.pdf
    • http://globelend.net/uploads/1/3/0/6/130621006/7bba9da7e9c44d.pdf
    • http://74-123-72-147.mgwnet.com/uploads/1/3/0/6/130640074/2215677.pdf
    • http://www.jumpkapiti.nz/uploads/1/3/0/7/130739653/186cad4d3ba2.pdf
    • http://oakscorp.com/uploads/1/3/0/7/130739878/kezisuf.pdf
    • http://robertsenterprisesllc.com/uploads/1/3/0/5/130590195/dipeweroxumamap.pdf
    • http://mta-sts.mx.charterbusrentalservice.com/uploads/1/3/1/0/131070566/5520678.pdf
    • http://lowcountrylabradoodles.com/uploads/1/3/0/3/130313495/duraxorarumaban_petenuvedejenum_jemiduzap_ruvakaza.pdf
    • http://www.sherrysgrandapparel.com/uploads/1/3/0/2/130287842/3961359.pdf
    • http://machinetrader.net/uploads/1/3/0/5/130539726/3430170.pdf
    • http://www.chrispends.com/uploads/1/3/0/3/130313603/6edef1ed49.pdf
    • http://myallscent.com/uploads/1/3/0/4/130488699/f7c4e.pdf
    • http://kbberakah.com/uploads/1/3/0/7/130738506/bfee8d9cab5ec5.pdf
    • http://economic-social-justice.org/uploads/1/3/0/6/130621730/botepurukojuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000794c.bin
6a81ebaa964232c71046968bc579441eefc8a3f058ae347e89c5ebd6f411ce9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 10280 bytes
font_01_sfnt_off00009bb3.bin
22cb3c47a93dec2a89a4f931027bbcf075d615f24fb0aa0fcbfc0fd15bf4f9e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB3 2768 bytes