Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51afebfef885630…

MALICIOUS

PDF

42.8 KB Created: 2020-03-30 22:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 254b222ddf4d6ece8d50887bee4f6f39 SHA-1: dceb4fea7b810052ecae72fd2d5f7aac6f9fd738 SHA-256: d51afebfef88563051a3497e9f7582b2210e0df6530417f1743afa1b2cdb0923
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

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 sites. The ML classifier strongly indicated maliciousness. The document body contains garbled text but includes a URL that is also listed in the heuristics and IOCs, indicating a potential lure or redirection mechanism.

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://kimresine.ca/uploads/1/3/1/4/131407818/131407818.html#resumen+acuerdo+696+educacion+basica
    • http://triatlonboladelmundo.com/uploads/1/3/0/6/130639676/5535032.pdf
    • http://myaffordablegaragedoor.info/uploads/1/3/0/5/130589103/falipefaxosu.pdf
    • http://aldenscarpetsanddrapes.com/uploads/1/3/0/7/130739779/388657.pdf
    • http://nikkikorthart.com/uploads/1/3/0/9/130969656/juxapojegok_pujipovurof_misavujadegig.pdf
    • http://ethnicbusiness.org/uploads/1/3/0/4/130488565/doron_fuweberikuli_fasawekog_sipolugemogano.pdf
    • http://caraseabornportfolio.com/uploads/1/3/0/3/130313293/tupumig_nejaja_famedazana_mevovuvi.pdf
    • http://neflex.eu/uploads/1/3/0/2/130272936/4e7aa23170521.pdf
    • http://maeyoushine.com/uploads/1/3/0/5/130545396/5613310.pdf
    • http://markpotts.us/uploads/1/3/0/2/130271211/lexoxegowovorufenufe.pdf
    • http://steedscottlaw.com/uploads/1/3/0/2/130271211/rezinuvepuwow.pdf
    • http://columbiabasinexteriors.com/uploads/1/3/0/4/130483390/jegoxinam.pdf
    • http://4lyfe.net/uploads/1/3/0/6/130620996/8139094.pdf
    • http://southernshipshaper.com/uploads/1/3/1/3/131379398/6143859.pdf
    • http://artbystein.com/uploads/1/3/0/5/130538880/7335404.pdf
    • http://aucklandpolo.com/uploads/1/3/0/6/130620565/gemeke-lofutupofer-rixowuwofo.pdf
    • http://tradecryptoinvestor.com/uploads/1/3/0/3/130323145/9064524.pdf
    • http://surfacepros.online/uploads/1/3/0/4/130489102/sirovomukojajafidiw.pdf
    • http://saffleplantfarm.com/uploads/1/3/0/2/130272600/bojosowiwos.pdf
    • http://pccmonroe.com/uploads/1/3/0/7/130776486/femupijuba.pdf
    • http://920meats.com/uploads/1/3/0/5/130588757/3892d4e0bdf99.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bb5.bin
32819fe83811532b660d6da5f34a8f5d06bc6592f099542cf0e2bb1f1cb2573a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB5 9060 bytes

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