Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fd85cca9b3d37c…

MALICIOUS

PDF

50.9 KB Created: 2020-06-01 20:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b20e77bc77e1f872e68a1dcf07129b SHA-1: a275d28ccd1e05bfe9f16887652839b7f73d25f8 SHA-256: 19fd85cca9b3d37c40f560c6013ae51e3e176de142ecf0a348960697fe63d1cb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to PDF files hosted on various domains. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of these links, suggesting a coordinated effort to distribute content or redirect users. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic indicate a likely attack pattern involving redirection to malicious content or phishing 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://stashpage.com/uploads/1/3/0/5/130551586/130551586.html#marketing+para+o+s%25C3%25A9culo+xxi+kotler
    • http://admin.kreativogroup.com/uploads/1/3/1/0/131070491/7783801.pdf
    • http://naughtygoodmorningpicturez.com/uploads/1/3/0/3/130313144/3633090.pdf
    • http://curtisconsultingnc.com/uploads/1/3/1/3/131380205/vizinezadewel-digelapimen-lovomid.pdf
    • http://cellmark-se.com/uploads/1/3/0/6/130620390/xipafiruku.pdf
    • http://chofministry.org/uploads/1/3/0/5/130588653/tojisuvaxenexog_jefasoxumuxera_borozus.pdf
    • http://coldwetfriends.com/uploads/1/3/1/3/131384708/5d0dde40789.pdf
    • http://friendsofvillagex.org/uploads/1/3/0/4/130488619/73efb48.pdf
    • http://kaartstudio.com/uploads/1/3/0/5/130588545/5008387.pdf
    • http://stashpage.com/uploads/1/3/0/5/130551586/terms.html
    • http://stashpage.com/uploads/1/3/0/5/130551586/dmca.html
    • http://stashpage.com/uploads/1/3/0/5/130551586/policy.html
    • http://stashpage.com/
    • https://vimolor.files.wordpress.com/2020/05/difutoxevobanolokuruximar.pdf
    • https://kilotoxite.files.wordpress.com/2020/06/82550146038.pdf
    • https://duzawexosusa.files.wordpress.com/2020/05/xifexeninijavodo.pdf
    • https://vitiwifapen.files.wordpress.com/2020/05/kujegatulupuki.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_off000095c0.bin
5454ddb18966c1f0570ee623f40732cfdf425ca37aff4b140dc3233d1db3a405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C0 12988 bytes

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