Malicious PDF — malware analysis report

Static analysis result for SHA-256 09346bcefc2c110d…

MALICIOUS

PDF

31.0 KB Created: 2020-03-14 13:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6cd5138c7467e8f0e4ff134159406527 SHA-1: 8174f2c605dd1c3973d4831e2ddc3d3dce4a730c SHA-256: 09346bcefc2c110d91ab6cdc5b37d9dd0380b831525104133c17b44849c7eba0
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further compromise.

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://autodiscover.jacquelineclewis.com/uploads/1/3/0/2/130272903/130272903.html#bauducco+foods+company+information
    • http://tomcookephotography.com/uploads/1/3/0/5/130538840/furuxodemape-vefoji-wedurisefol.pdf
    • http://vanentrepot.com/uploads/1/3/0/5/130543772/fejevebego_wozagafov_migujuxirosum.pdf
    • http://johnhancockcenterchicago.com/uploads/1/3/0/2/130273582/5491421.pdf
    • http://mta-sts.mx.rockypointboatdock.com/uploads/1/3/0/5/130545745/natozeziki-ditidikal-xixefusofavu.pdf
    • http://chriscaron.com/uploads/1/3/0/8/130874258/0df0c25f491.pdf
    • http://ravenheim.net/uploads/1/3/0/2/130273894/7032a2ea7.pdf
    • http://hannahhaleymakeup.com/uploads/1/3/0/5/130545429/5eebff.pdf
    • http://cssmstudents.com/uploads/1/3/0/3/130323374/fosivof_mowok_pawiguvixa.pdf
    • http://mail.driftwoodshoresdesigns.com/uploads/1/3/0/4/130476557/9472c3710d6d0a1.pdf
    • http://bumbleandsprout.com/uploads/1/3/0/5/130590521/mumodafesumegosu.pdf
    • http://nysmaplepartridge.com/uploads/1/3/0/6/130639971/lilotan-satexusepatu-moputoke.pdf
    • http://wifeycosmetics.com/uploads/1/3/0/6/130621457/kazezisase.pdf
    • http://office-management-support.com/uploads/1/3/0/6/130639835/6e6c4.pdf
    • http://www.bowencleaningservices.com/uploads/1/3/0/6/130640139/e8f22a4.pdf
    • http://restorepronh.com/uploads/1/3/0/6/130621019/5591710.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_off000053d2.bin
76f16fcf5f3843ccf227c50daf7367a08dbd6ee88bf181be8c8eee32150e090c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D2 6720 bytes

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