Malicious PDF — malware analysis report

Static analysis result for SHA-256 7106db606775ddf6…

MALICIOUS

PDF

64.1 KB Created: 2020-06-07 02:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48ff36b0ed35b064ed6f55f7ef2a0f0 SHA-1: a666068c09baa83d7f2840eaa09bde3cba18884b SHA-256: 7106db606775ddf6f4447a5f1f4ad9914841e30b5bb3524d2b69e27c7e13ecdb
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 URL and the numerous other extracted URLs point to external domains, indicating an attempt to direct the user away from the current document. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript for obfuscation or redirection, hence the inclusion of T1059.007.

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://marinfrenchtutor.francelaude.com/uploads/1/3/0/8/130873802/130873802.html#sloss+debate+pros+and+cons
    • http://mta-sts.pistadriftkartalbenga.it/uploads/1/3/1/0/131070841/nimafewanokopuw_nufup.pdf
    • http://mail.emmietaylorphoto.com/uploads/1/3/1/6/131636839/6544566.pdf
    • http://wcd-ont9trwo.mgh-r.ch/uploads/1/3/0/2/130289571/2605054.pdf
    • http://geminieyecarecenters.com/uploads/1/3/0/7/130738812/japobozunofu-midijigewiwaje-bitekevepajevik-luwunepujeni.pdf
    • http://cpanel.atlas-oprema.si/uploads/1/3/1/3/131398359/47e6156c93818b.pdf
    • http://dollstaryoga.com/uploads/1/3/1/6/131637291/talerizezeronoxez.pdf
    • http://0096997xstreamtravel.xsideas.com/uploads/1/3/1/3/131382166/jugusiderexisu.pdf
    • http://stricklandoutdoorsupply.com/uploads/1/3/0/7/130740466/jifajajuwobavuf.pdf
    • http://mercyhomes.net/uploads/1/3/1/6/131606140/takapi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sajonep214766859.files.wordpress.com/2020/06/56211897119.pdf
    • https://balujaxovajo.files.wordpress.com/2020/06/7006602028.pdf
    • https://zigonafi.files.wordpress.com/2020/06/vurofinex.pdf
    • https://pozugupikuza.files.wordpress.com/2020/06/37947392077.pdf
    • https://resuxinobol.files.wordpress.com/2020/06/90619239604.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_off0000cdc1.bin
a8968f80ca675b4133ad264b90d96d830028f7be75f2fb3f4226c49611495cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC1 12484 bytes

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