Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3d18c343a99047…

MALICIOUS

PDF

43.4 KB Created: 2020-03-25 13:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da479d65f9ff7cae0f3d71be023525c3 SHA-1: 084666459cc170e50af785d977ffa98affce9567 SHA-256: 6d3d18c343a990472e18efdd2d55175f40e13ea8d6337b7da8d0cd718f19a3d3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to rock metamorphism and authoring application details, but the primary malicious activity appears to be the mass distribution of links. No scripts were extracted, but the nature of the link farm suggests an attempt to manipulate search engine results or distribute malicious content via these external URLs. The ML classifier strongly flagged this PDF as malicious.

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://wellreadpro.net/uploads/1/3/0/9/130968981/130968981.html#tipos+de+metamorfismo+de+las+rocas
    • http://happyvids.com/uploads/1/3/0/5/130590029/wonudemevuwopodetuv.pdf
    • http://www.skinboostlab.org/uploads/1/3/0/2/130289557/mesezowizemoku.pdf
    • http://anotherwayguitar.com/uploads/1/3/0/6/130640232/puvadixame.pdf
    • http://www.desert-snow.com/uploads/1/3/0/7/130740050/cc3af9.pdf
    • http://leakrepairseattle.com/uploads/1/3/0/5/130589277/69be6d1e95144.pdf
    • http://type23.net/uploads/1/3/0/7/130775107/3524103c549.pdf
    • http://nynjpropertyinspections.com/uploads/1/3/0/7/130738637/xaxokularu-vetezewedodox-muvatik-kukilowatarad.pdf
    • http://quarkinstitute.org/uploads/1/3/0/4/130489175/5ed6aa.pdf
    • http://butterfliesandsweat.com/uploads/1/3/0/6/130621995/gosixeboramor_zuvewejomapowox.pdf
    • http://mchcsaint.com/uploads/1/3/0/3/130313087/detazefotujunukasa.pdf
    • http://ausalon.com/uploads/1/3/0/5/130552034/5777446.pdf
    • http://barnproduction.com/uploads/1/3/0/8/130813846/bbb5d29e2c5.pdf
    • http://www.need4apps.com/uploads/1/3/0/5/130589371/gokuzesiduselo.pdf
    • http://www.a2zgeneralconstruction.com/uploads/1/3/0/6/130639386/0d701f7bdf223.pdf
    • http://hollowrocktenkiller.com/uploads/1/3/0/3/130323227/7453564.pdf
    • http://www.bigd401k.com/uploads/1/3/0/3/130323888/mixediges.pdf
    • http://independentit.net/uploads/1/3/0/2/130287953/4f628ece3b9.pdf
    • http://www.laplatapelotherapy.com/uploads/1/3/0/8/130874416/pudipumepudejoz_woxekokera_vutumu_pumoguwo.pdf
    • http://architechart.com/uploads/1/3/0/6/130621432/vetusegulito-febumipefeku-nepudinewega.pdf
    • http://abundant-lifechurch.com/uploads/1/3/0/7/130739280/2593214.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000789d.bin
aa32373c2d23d53182517e19ec96d776052a459c40bff82648dc184c9356edfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 8072 bytes
font_01_sfnt_off00009662.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 2668 bytes

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