Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0e7c6188afb824…

MALICIOUS

PDF

35.8 KB Created: 2020-06-12 03:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef7784ea13e62045b84139deec1bac8c SHA-1: 29e0c97bb39cfd9cf88914aeb8a1cf8bef71fd4f SHA-256: ba0e7c6188afb824d674f34f44c278e1666723d5cf0fa37a2cd9be17adeaa625
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains the text 'Buyer guide ponsel' and several of these URLs, suggesting a lure to external content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users to potentially malicious websites.

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://elementsofthemessage.com/uploads/1/3/0/3/130323932/130323932.html#buyer+guide+ponsel
    • http://k-bidrealty.com/uploads/1/3/0/6/130604494/wugelukatawepi_buwapolabevuj.pdf
    • http://newbeginningsfamilyservices.org/uploads/1/3/1/4/131453198/potokedafokusek.pdf
    • http://selecki.com/uploads/1/3/0/7/130776220/9502685.pdf
    • http://cr.undesirable.us/uploads/1/3/1/6/131636702/nifavitenif.pdf
    • http://unavoceensemble.com/uploads/1/3/1/4/131409861/wiwawimomidori_newogi_zosobigoju.pdf
    • http://neilbricco.com/uploads/1/3/0/4/130435555/katuwoxozoraboz_tukivawivogare_kibuxakaze_woxogawev.pdf
    • http://chestersgetaway.com/uploads/1/3/0/7/130775205/godif.pdf
    • https://badiwilam.files.wordpress.com/2020/06/reparelefobek.pdf
    • https://bivuwid.files.wordpress.com/2020/06/bikevojawujuwitiserelin.pdf
    • https://zolibuvove523289473.files.wordpress.com/2020/06/resutarur.pdf
    • https://gefivit.files.wordpress.com/2020/06/37882823101.pdf
    • https://dodazit994824591.files.wordpress.com/2020/06/nemakusegumo.pdf
    • https://nobivewix214068776.files.wordpress.com/2020/06/wunisuwo.pdf
    • https://pogureni14783435.files.wordpress.com/2020/06/82436683776.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/
    • https://dodazit994824591.files.wordpress.com/2020

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f60.bin
7b9badefb13b3ad37399b56327b82665f2fdf3dbf805697aa07e46dcdaac86ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 10664 bytes

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