Malicious PDF — malware analysis report

Static analysis result for SHA-256 708428e14c15fc07…

MALICIOUS

PDF

39.2 KB Created: 2020-04-03 04:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b789d9466d9a36a9998b07a7775348db SHA-1: 11547f4e394249b354471ca07bbc29fa3e14582b SHA-256: 708428e14c15fc075c133772a6674de2eaafb39f07ad22c7f39df0005d8bde78
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files. This behavior is indicative of a link farm or a method to distribute malicious content under the guise of legitimate documents. The ML classifier strongly supports the malicious verdict, and the PDF structure with numerous external links is a known tactic for SEO manipulation or malware distribution.

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://khpottery.com/uploads/1/3/0/9/130969310/130969310.html#unit+iv+worksheet+2+physics+answer+key
    • http://ontotheblue.com/uploads/1/3/0/2/130289570/2452058.pdf
    • http://jakieraseye.com/uploads/1/3/0/5/130589122/7997980.pdf
    • http://aleriongames.us/uploads/1/3/0/5/130589208/potem-bosenajisonupan-lisujiv-mitud.pdf
    • http://drmelindamorros.com/uploads/1/3/0/7/130775476/duvobupe-zuzasupunavo-vivusazuxuz-pibapijefakubaw.pdf
    • http://halcyoncenter.com/uploads/1/3/0/6/130640136/860a3e35717.pdf
    • http://mylaraonline.com/uploads/1/3/0/2/130273850/mesesutupafa_bonitusaz.pdf
    • http://bao-zizi.com/uploads/1/3/0/5/130544384/9df9f990d4ea465.pdf
    • http://mrmojo.com.br/uploads/1/3/0/5/130544134/tawepevubeg_rawejolakubes_melemalo_fetuju.pdf
    • http://mail.toneelverenigingdelier.nl/uploads/1/3/0/2/130287283/dumimil_kuwudilozakesil.pdf
    • http://mmprofilingandsharpening.com/uploads/1/3/0/7/130776677/wivaxadoka-musatunukup.pdf
    • http://familywellnessguru.com/uploads/1/3/0/4/130490245/120e5b41eb4.pdf
    • http://ontopinvestors.com/uploads/1/3/0/5/130539235/b47cbfadbb22ba.pdf
    • http://jbkapp.com/uploads/1/3/0/7/130775123/1543231.pdf
    • http://elohimcosmeticos.com/uploads/1/3/0/8/130814340/bafoxov.pdf
    • http://arnosrepairs.com/uploads/1/3/0/7/130776864/rowufazono-gowogo-riven-muzepom.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_off00006fbf.bin
8a8cc686b5c2ff4470e01d5078dd897c51c3f8a4f90c1ad1891f209679e652f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 8156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.