Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62303eabfac7c06…

MALICIOUS

PDF

30.4 KB Created: 2020-05-22 12:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39da05b7437df6b41f9cdc7762d42a80 SHA-1: 440d02f09690eec40435c937e515f9b9c1e2c1ce SHA-256: b62303eabfac7c06a4ffd58a99f5069663b62a5f216c5c33b56fcaf26fed549e
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique commonly used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The document body contains a lure related to 'minecraft modlu survival nas1l indir', suggesting a social engineering pretext to drive traffic to the linked domains.

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://buggy97.pleasingfood.com/uploads/1/3/0/6/130622012/130622012.html#minecraft+modlu+survival+nas%25C4%25B1l+indir
    • http://polr.golf/uploads/1/3/1/8/131856009/bdee597471.pdf
    • http://qualworks.net/uploads/1/3/1/0/131070196/c42e8f9a9.pdf
    • http://yourfilmcorner.com/uploads/1/3/0/6/130620365/sunomabe_tisokeroti_suxafazeza_xokupowadifom.pdf
    • http://sisterfriendlyproductions.com/uploads/1/3/1/4/131437859/rafakuwaleran-numegawu-defut.pdf
    • http://kragero-montessori.no/uploads/1/3/0/6/130620601/virovuvakibi-rudibujanitovap-wugilixujo-pafarafaxekitis.pdf
    • http://juanodeonphotography.com/uploads/1/3/0/9/130969923/6779409.pdf
    • http://naschberger.org/uploads/1/3/0/2/130270783/taxak_tojekadav.pdf
    • http://bazil.design/uploads/1/3/0/5/130590191/fbe375b4d19.pdf
    • http://clearlakelionshop.com/uploads/1/3/0/8/130813357/394681.pdf
    • http://truelawncaremd.com/uploads/1/3/0/4/130483806/4547e79c4e327.pdf
    • http://babyreadybundles.com/uploads/1/3/0/5/130539095/rologovobafo.pdf
    • http://pasadenaapplianceservice.com/uploads/1/3/1/1/131164054/levizumodes.pdf
    • http://seyajewels.com/uploads/1/3/0/5/130545816/c9b3a1a1.pdf
    • http://theatlantasnob.com/uploads/1/3/0/2/130287299/bolifevopenokolemi.pdf
    • http://celebration-center.com/uploads/1/3/1/4/131406892/lusaratixilip-dasopi.pdf
    • http://tenaciouspsteasandcommodities.com/uploads/1/3/0/2/130270923/sazumopazanogijisewi.pdf
    • http://mjlivinghealthy.com/uploads/1/3/0/5/130545643/9a9050579ca.pdf
    • http://healingstonejewelery.com/uploads/1/3/0/5/130588732/6616031.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_off00004c04.bin
30d5a800a6f58413be518767b4bf090c363780c5356a02524db92ded96c2615f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C04 9860 bytes