Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e32fe365b1355a1…

MALICIOUS

PDF

87.2 KB Created: 2020-03-22 06:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a1eea931bdb3c4c94f597d6a5d88548d SHA-1: c214e07ccbc1e9db26abf0737cf729fe2ef4e7af SHA-256: 5e32fe365b1355a13bceb779f1fa42af3fa193d4fd7e77c33a26ece7f895a23c
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a gateway to further compromise.

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://murraywhiteley.com/uploads/1/3/0/9/130969183/130969183.html#what+does+regular+pentagon+mean+in+math
    • http://vancouvervacationrentals.org/uploads/1/3/0/2/130274370/vinojasode.pdf
    • http://htxontherise.com/uploads/1/3/0/3/130313403/kasakelewiwigebum.pdf
    • http://www.hopemelbourne.com.au/uploads/1/3/0/5/130551556/e8e65db15dead4a.pdf
    • http://homeinfoinyorkregion.com/uploads/1/3/0/5/130550992/319116.pdf
    • http://lovetalkconvos.com/uploads/1/3/0/6/130639209/41df0.pdf
    • http://sherwoodparkpianolessons.com/uploads/1/3/0/7/130775009/mazazunus.pdf
    • http://mta-sts.mx.nataliajdonofrio.net/uploads/1/3/0/8/130814145/mikoxeb.pdf
    • http://walnutstreetsoapco.com/uploads/1/3/0/8/130813651/fexuwun-durefomazubej-tinisiperub.pdf
    • http://cpanel.morningstartraders.com/uploads/1/3/0/8/130814460/6137813.pdf
    • http://msjsport.net/uploads/1/3/0/7/130739876/5691747.pdf
    • http://enlightenedhealthcoaching.com/uploads/1/3/0/6/130620926/vipafu.pdf
    • http://mail.charisministries.org/uploads/1/3/0/6/130639805/3591123e70dcb.pdf
    • http://www.claudineyoga.com/uploads/1/3/0/3/130313069/zokogaluju-digepatepezig.pdf
    • http://minjukim.com/uploads/1/3/0/2/130273733/kavesudolibe-kakawufux-tagilobodez-rojavepunopep.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e2.bin
deb4588665d84ff69a9522bac432ec8f0b650b11b9dc6b12a58c429d497aedff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 11136 bytes
font_01_sfnt_off00011993.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11993 4144 bytes
font_02_sfnt_off0001268c.bin
f6306135abe2a5f33ee28647d9bc89d236fd146e05d691c4041f5484e855ac28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268C 5400 bytes
font_03_sfnt_off0001374e.bin
3ad4abd5bf79abe5b8e102fd68f57d19bc92ef1adfc1d11b12b991aee8cf4a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1374E 16384 bytes

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