Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ca6788412d9ee5…

MALICIOUS

PDF

42.2 KB Created: 2020-03-29 01:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 686cfbcffb203c755770ed528fc2a96b SHA-1: d7014ca7792c65b9f543b5bb5ef3e778b900543c SHA-256: 77ca6788412d9ee580d81c0694883f4d72d19c10a3e07fa2c716d71843b7e8fe
104 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified as a link farm. The document body, though partially corrupted, contains text related to 'document type tables in sap fico' and mentions invoice or payment language, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The embedded links likely lead to a second-stage payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nobuhotelshoreditch.devsite-1.com/uploads/1/3/0/5/130590592/130590592.html#document+type+tables+in+sap+fico
    • http://builder.geoffgoodsonhorsemanship.com/uploads/1/3/0/5/130551416/kuruwetefa_mijibominejupug.pdf
    • http://directmailmarketing.com.au/uploads/1/3/0/7/130739143/8526318.pdf
    • http://mwellproductions.com/uploads/1/3/0/5/130541462/dagilimepon_voxulatuna_regemusan_mapaf.pdf
    • http://cest-magnifique.net/uploads/1/3/0/6/130621284/2611544.pdf
    • http://morganmwilliams.com/uploads/1/3/0/7/130740222/2231308.pdf
    • http://nathan-paull-football.com/uploads/1/3/0/7/130775970/17cbf10.pdf
    • http://www.maerifa-magazine.com/uploads/1/3/0/6/130620202/7049204.pdf
    • http://hostmaster.asna.com.au/uploads/1/3/0/3/130379377/rujejoru.pdf
    • http://chriswongfitness.com/uploads/1/3/0/5/130542935/ponalelekumu.pdf
    • http://beavercreekpersonaltraining.com/uploads/1/3/0/4/130488846/jokobek.pdf
    • http://9fiveitaly.com/uploads/1/3/0/5/130589216/kekizevilixefa.pdf
    • http://ccsecursos.com/uploads/1/3/0/3/130313624/jekapu-mifirowo.pdf
    • http://martinvizzina.com/uploads/1/3/0/2/130289296/adb9fe7f5b81.pdf
    • http://reclaimthespace.com/uploads/1/3/0/7/130738759/6267888.pdf
    • http://net-formance.fr/uploads/1/3/0/4/130476720/797491.pdf
    • http://psquaredecommercellc.com/uploads/1/3/0/6/130621844/giboj-mapefudagigidal-ziwijajekesafap-zageruxoruko.pdf
    • http://parkplacedepot.com/uploads/1/3/0/3/130313082/bipetamabatuf-tafegozitubape-potozivug.pdf
    • http://colombiahumanrights.org/uploads/1/3/0/6/130621533/7744971.pdf
    • http://elliehunt8.com/uploads/1/3/0/8/130814088/kitigazajuguzo.pdf
    • http://allequallfoundation.com/uploads/1/3/0/5/130539238/dazedaziso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000733f.bin
8e07b87a138c9284acc4b95aaa5d5a2d91fcda9e3b4793b20a01e6873cab8a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733F 7740 bytes
font_01_sfnt_off00009174.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9174 2652 bytes

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