Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4f60d97ce8cc79…

MALICIOUS

PDF

37.5 KB Created: 2020-03-20 05:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ea9da3336e5fbc2424d209fad613bc01 SHA-1: 93295a4511aa60cf17f837812e91804a758f392a SHA-256: ef4f60d97ce8cc7993b9e61e7683ff124e3d50b994d250d8aeb6d2efac35fd4b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, contains URLs that are part of this link farm, suggesting a SEO poisoning or content distribution scheme. No scripts were extracted from this sample.

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://seymourstrategies.com/uploads/1/3/0/9/130969960/130969960.html#dibujo+de+nomadas+para+colorear
    • http://applehillteas.com/uploads/1/3/0/5/130551714/2001536.pdf
    • http://cannamessages.com/uploads/1/3/0/7/130738974/niwibamavo-nanexuto.pdf
    • http://www.stevesgarageattic.com/uploads/1/3/0/9/130968963/xumunileludizorebavo.pdf
    • http://therosegoldketocollection.com/uploads/1/3/0/7/130775627/4808315.pdf
    • http://www.connybatho.com/uploads/1/3/0/5/130550682/futifen_gekikezexopin_kalapuwufejomu_lugamegijanugu.pdf
    • http://mayusilkart.org/uploads/1/3/0/5/130588960/nilotil-pafadinafesuwag-jirug-bogijagin.pdf
    • http://reboundat.com/uploads/1/3/0/4/130435570/batekono_pudegul_buvitasonibewo.pdf
    • http://healthytower.org/uploads/1/3/0/4/130436362/9708356.pdf
    • http://ortaklargrup.net/uploads/1/3/0/5/130550783/zumikedenumason_bisilefupupatez_gibovome.pdf
    • http://www.plugibility.com/uploads/1/3/0/2/130289669/1967d98fa3.pdf
    • http://funkshuiflow.com/uploads/1/3/0/7/130775768/6702452.pdf
    • http://lolque.com/uploads/1/3/0/5/130551512/kubenuto.pdf
    • http://bellacapella.info/uploads/1/3/0/4/130476144/64ba6fb.pdf
    • http://trustcld.net/uploads/1/3/0/7/130775474/bikadoza_votavix_xurofuvotuzam_vemutusewejeku.pdf
    • http://keypersonresponsible.com/uploads/1/3/0/7/130775127/8653368.pdf
    • http://www.memotive.org/uploads/1/3/0/5/130550976/sedaviluwije.pdf
    • http://www.tech-jigger.com/uploads/1/3/0/7/130776747/9702761.pdf
    • http://communityhomecapital.com/uploads/1/3/0/5/130550966/4a97da0cf.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_off000068da.bin
8460dfad72b1e21787d93db498b84995334cfbce2df99355bf5d1c64cbc65690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 8208 bytes

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