Malicious PDF — malware analysis report

Static analysis result for SHA-256 721643b626a76f37…

MALICIOUS

PDF

37.2 KB Authoring application: OpenOffice Draw
MD5: 47aa05c6e92d0bf21f37dffc6018ebff SHA-1: 32bdbc1756eb17c01bab29dca61c25fa27b8cb6b SHA-256: 721643b626a76f37230295d97750ea9bd1943a1f33c9cf1ef2f9dcc84f694513
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious payloads. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it with high confidence. The primary attack pattern involves directing users to a multitude of external PDF resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://rtbartist.com/uploads/1/3/0/2/130272275/5252228.pdf
    • http://keenlingo.com/uploads/1/3/0/6/130604110/bodixuxutunolez_sufokepelupid.pdf
    • http://digitalmarketingscout.com/uploads/1/3/0/5/130551794/boseforilisojaf-gewugenujo.pdf
    • http://normanreznicowod.com/uploads/1/3/0/6/130604310/gogesogonuxisaluni.pdf
    • http://noticias.aeromar.mx/uploads/1/3/0/2/130270985/36821280cd07b1.pdf
    • http://celebritydiethealth.com/uploads/1/3/0/5/130589245/repafujepadile.pdf
    • http://eterpath.com/uploads/1/3/0/6/130604419/6726270.pdf
    • http://yessicafandinofiore.com/uploads/1/3/0/2/130289775/80f8e196be.pdf
    • http://newsmandan.net/uploads/1/3/0/5/130541351/4683908.pdf
    • http://oceanpsalms.com/uploads/1/3/0/6/130604550/1589603.pdf
    • http://iqcu.biz/uploads/1/3/0/7/130775878/xitikutazake_bakofemipaxifu_wuselagefono_fesulajabexesu.pdf
    • http://newrisestrategy.com/uploads/1/3/0/6/130605278/xotiwaregeboj.pdf
    • http://tenajanutrition.com/uploads/1/3/0/5/130588473/sififefewu_jesuxef.pdf
    • http://staceyphillips.online/uploads/1/3/0/7/130775288/b5cdcac3.pdf
    • http://infinitesalonboutique.net/uploads/1/3/0/6/130639437/fikivojazeka-durigax-suwaralibol-wobupugosidobo.pdf
    • http://church-playgroundequipment.com/uploads/1/3/0/8/130814687/2549108.pdf
    • http://wcd-d68elmwx.mgh-r.ch/uploads/1/3/0/3/130379427/130379427.html#treatment+for+dysfunctional+uterine+bleeding

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000363e.bin
d3f34ba8ddec3e7a434acaa97f9a94947eeed3db662cc9e88dcb0e82a43989e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x363E 7652 bytes

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