Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e649ac914176be…

MALICIOUS

PDF

35.3 KB Created: 2020-06-06 07:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69a1a221df54ad798b2b95adefdb4bed SHA-1: 61f85c796f6b7aa1a00c1650b6123f8938c8f5a4 SHA-256: 76e649ac914176be31c1474f5927711945194f70d8be622d6a81a750e44b06cd
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The embedded document body, though heavily corrupted, contains URLs that are also listed in the extracted URLs section. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a malicious intent to redirect users to potentially harmful sites.

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://rowdybartending.com/uploads/1/3/0/9/130969459/130969459.html#l%25C3%25ADnea+de+tiempo+de+la+mercadotecnia
    • http://cpanel.shirebourne.com/uploads/1/3/1/3/131380609/4719556.pdf
    • http://media.hfullerton.com/uploads/1/3/1/4/131437685/bukifov.pdf
    • http://gmcengineering.net/uploads/1/3/1/0/131070485/1120106.pdf
    • http://navasotaminerals.com/uploads/1/3/0/5/130551727/3313055.pdf
    • http://elitelookglow.com/uploads/1/3/0/6/130622092/lunavavusisifozu.pdf
    • http://avlcbdrx.com/uploads/1/3/0/7/130739222/pexavowilovikowi.pdf
    • http://rowdybartending.com/uploads/1/3/0/9/130969459/terms.html
    • http://rowdybartending.com/uploads/1/3/0/9/130969459/dmca.html
    • http://rowdybartending.com/uploads/1/3/0/9/130969459/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jidiluda.files.wordpress.com/2020/06/2221797165.pdf
    • https://pusivogaj.files.wordpress.com/2020/06/laviginazemu.pdf
    • https://rifexekewo.files.wordpress.com/2020/06/99922180182.pdf
    • https://pigipuzezaz.files.wordpress.com/2020/06/podenezetowujejuvax.pdf
    • https://sufajase.files.wordpress.com/2020/06/97319544182.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aca.bin
05fa427644ccd6f35b13a411954f861f393477c699480384e776a22256d83b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACA 11376 bytes

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