Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57c96d92d4c0ccf…

MALICIOUS

PDF

46.7 KB Created: 2020-03-29 10:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c399e80fca73bd83dec02d76c28ded0 SHA-1: d82d2a142a160da38e5113bb2a49ed8f017b278f SHA-256: d57c96d92d4c0ccfd9b0ee6f08f23711cb713a647b68751b18bcabe319ca8027
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body, though partially corrupted, contains text suggesting it is an 'interactive guide' and includes the wkhtmltopdf application name. This indicates a likely attempt to disguise malicious links as legitimate content, leading users to potentially malicious websites for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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://74-123-77-90.mgwnet.com/uploads/1/3/0/7/130739883/130739883.html#exani+ii+2018+guia+interactiva
    • http://positiefsamenwerken.info/uploads/1/3/0/8/130873796/a7c416.pdf
    • http://rochesterepoxycoatings.com/uploads/1/3/0/8/130814283/6a76c7.pdf
    • http://unstoppablecouple.com/uploads/1/3/0/5/130551986/sodonomer_verivuxa_mutorupake_zoxatugewurox.pdf
    • http://youthnowfarm.ca/uploads/1/3/0/7/130776481/wuwigiwabevurinubow.pdf
    • http://charlottelandscapingdesigns.com/uploads/1/3/0/5/130588263/3176990.pdf
    • http://thehappyhaircompany.com/uploads/1/3/0/4/130491075/cb869ebdd1d0c3.pdf
    • http://albalindaproperties.com/uploads/1/3/0/7/130775796/7477078.pdf
    • http://www.kylicobeauty.com/uploads/1/3/0/3/130323806/2079745.pdf
    • http://autodiscover.lanternhousedogcare.co.uk/uploads/1/3/0/7/130739433/9045184.pdf
    • http://forcefieldtraining.com/uploads/1/3/0/9/130969306/dunemerinoxiv.pdf
    • http://playwarhammer.com/uploads/1/3/0/3/130324357/8505268.pdf
    • http://mta-sts.mail.yistamford.org/uploads/1/3/0/4/130436519/virip-guroxe-kesadew.pdf
    • http://600guyon.com/uploads/1/3/0/7/130740148/ce0424e00.pdf
    • http://www.wbunovice.org/uploads/1/3/0/3/130323341/sabotodiwonog.pdf
    • http://stunningsphynxkitten.com/uploads/1/3/0/3/130313495/8111590.pdf
    • http://elyriasmokerswarehouse.com/uploads/1/3/0/4/130476053/zixomaxepineko-lizotibamotukik.pdf
    • http://kyledropp.com/uploads/1/3/0/7/130739629/nevebitago.pdf
    • http://www.colauttigroup.com/uploads/1/3/0/3/130323588/8fc2cd.pdf
    • http://theredenturecenter.com/uploads/1/3/0/6/130604209/6255679.pdf
    • http://justinleokennedymusic.com/uploads/1/3/0/5/130548070/mekuretexel-wufelu-dejal-lejerinu.pdf
    • http://mail.solriso.com/uploads/1/3/0/6/130604493/c15723032315198.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_off00008c59.bin
afca46abb777cbefc846e44556dcd8924bec953bfc603998c240833ccc938c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 8584 bytes

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