Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeba433f80c92326…

MALICIOUS

PDF

29.4 KB Created: 2020-05-02 20:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0c8067096083ffdc3e193f1d5b9f199b SHA-1: 4dfc963981a418ef660b4f43e1f019542fc593b4 SHA-256: eeba433f80c9232696942f13366068f5d5b12b96c937503a3d061239314681a9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or content distribution network. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links and the ML score suggest a malicious intent, possibly for SEO manipulation or to serve further malicious payloads.

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://hydrolactic.com/uploads/1/3/0/7/130739023/130739023.html#beelzebub+episode+1+eng+sub
    • http://synchronyleds.us/uploads/1/3/0/6/130620958/31365396275c5.pdf
    • http://heatherpilates.com/uploads/1/3/1/4/131437668/bixunewuvona-fejotubij-warutival-wenokuj.pdf
    • http://chelsealogic.com/uploads/1/3/0/5/130544898/f19fa0dbedd4a.pdf
    • http://funnyparodys.com/uploads/1/3/0/6/130604363/nerexefelodido.pdf
    • http://bluegrassbotanic.com/uploads/1/3/0/4/130483573/zekuxojupomutabiburi.pdf
    • http://southlandbaptisttemple.org/uploads/1/3/1/4/131408032/xexodupuvip-negokebiwaweluv-kizamilawejaxaj-rejopozofewowus.pdf
    • http://winikatescanecorso.com/uploads/1/3/1/6/131607733/wufomadefepi.pdf
    • http://grantednotary.net/uploads/1/3/0/3/130379227/1233864.pdf
    • http://protraint.com/uploads/1/3/0/6/130621542/225a2.pdf
    • http://fgrealestate.net/uploads/1/3/0/6/130604175/tinivoru.pdf
    • http://wellnessembodiedhealth.com/uploads/1/3/1/4/131454733/5442646.pdf
    • http://plcbasketball.com/uploads/1/3/0/6/130604427/8626083.pdf
    • http://neilwperssoncpa.net/uploads/1/3/1/6/131636570/4169845.pdf
    • http://mrdoghk.com/uploads/1/3/0/2/130288762/golesexulejilubi.pdf
    • http://bryind.com/uploads/1/3/0/4/130436494/b86eda973375.pdf
    • http://thelightingclub.com/uploads/1/3/1/4/131406455/tilaguziver.pdf
    • http://ecopropertysolutions.net/uploads/1/3/0/6/130639228/boxalifivutum-ronufurawaka-zadopudemujeri.pdf
    • http://rightpointclinic.com/uploads/1/3/0/9/130969759/mudexuxoji.pdf
    • http://autographedbaseballs.com/uploads/1/3/0/2/130272877/2022252.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_off00004df8.bin
edd8ea515e3a7f8d86dfd5e31b144da6378a7552df4c8c577e146c44e9175e2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF8 6508 bytes