Malicious PDF — malware analysis report

Static analysis result for SHA-256 78642c59c70d3324…

MALICIOUS

PDF

82.2 KB Created: 2020-06-03 19:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb814e783b7b6cf95015476f7aa81aa SHA-1: 899f52ebce67da07c2b7ea44fc6295bbb00ca7de SHA-256: 78642c59c70d33240132dbc0a1de647685fb1edfe38fb97ce7ca9d8b62cca4ad
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to unrelated domains and appear to be part of a link farm designed to attract traffic. The document body mentions 'The Moorish Empire' and includes metadata from wkhtmltopdf, suggesting it was generated programmatically to host these links. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to direct users to potentially harmful websites for phishing or other scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://34y.undesirable.us/uploads/1/3/0/2/130288379/130288379.html#the+moorish+empire
    • http://goodfoodwelove.com/uploads/1/3/0/5/130588288/8200038.pdf
    • http://mrsmckiskissocialstudieswebsite.com/uploads/1/3/0/6/130621464/425608.pdf
    • http://juliashaas.com/uploads/1/3/0/5/130540619/856bfc213f837.pdf
    • http://mx.tommydoggy.com/uploads/1/3/0/9/130969478/lidegube_jariboxenezu.pdf
    • http://mominizedlife.com/uploads/1/3/0/7/130775056/tubanubofafu.pdf
    • http://34y.undesirable.us/uploads/1/3/0/2/130288379/terms.html
    • http://34y.undesirable.us/uploads/1/3/0/2/130288379/dmca.html
    • http://34y.undesirable.us/uploads/1/3/0/2/130288379/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://janivuveraku.files.wordpress.com/2020/05/kapaniwosasixapeboxejena.pdf
    • https://nixalomitu.files.wordpress.com/2020/05/jojozadamekakerulokebi.pdf
    • https://dawileva.files.wordpress.com/2020/05/nozudariwusekukunujej.pdf
    • https://pasuvawax.files.wordpress.com/2020/05/23962509449.pdf
    • https://muvowovu.files.wordpress.com/2020/05/29908281216.pdf
    • https://ridizuzusena.files.wordpress.com/2020/06/51880774597.pdf
    • https://ruxejetufe.files.wordpress.com/2020/06/53128587783.pdf
    • https://nirakopifaz.files.wordpress.com/2020/06/20150265135.pdf
    • https://velefibilon.files.wordpress.com/2020/06/safagokivuzivasisi.pdf
    • https://juzifak.files.wordpress.com/2020/06/72475024396.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_off0000e6ab.bin
468ea71d7859072dc0f5c7f44594f69d27a5baaf6184709af5e48e3c7a421136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 16296 bytes
font_01_sfnt_off000117eb.bin
7b800dd32704f6fbcf4bd96cde9804cb5e9335d52adbb6e1895d46b3d99739a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 17524 bytes
font_02_sfnt_off0001325e.bin
18ede821a4f229bea4b15df3639780a4c08ee7e8bdcb0987a1a1244544952518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 2416 bytes

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