Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1116ed3db1fbd1…

MALICIOUS

PDF

38.0 KB Authoring application: SWFTools
MD5: 2e0c368dfca38b15092c7aaffc08d6b7 SHA-1: 17f7e7f534e1be58851a3fcfd661faf15d5e735b SHA-256: 4f1116ed3db1fbd140440b1c91b898d0b489bbddccf5de37ee30486364d56f8c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The ML classifier also strongly flagged this file as malicious.

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://cnchomecrafts.net/uploads/1/3/0/5/130541272/jatiri.pdf
    • http://ceramikerie.de/uploads/1/3/0/4/130483329/gewefadimu.pdf
    • http://preservelegalsolutions.com/uploads/1/3/0/5/130588266/fadimidekuroj.pdf
    • http://xix.edmdealer.com/uploads/2020/01/28/7987424.pdf
    • http://mickeylawyer.com/uploads/1/3/0/5/130543537/7791f7edf4a.pdf
    • http://inshopper.site/uploads/1/3/0/2/130272381/mugotokefiletugodera.pdf
    • http://stonesoaps.com/uploads/1/3/0/4/130488096/lepeminetajomak_roxetilise_tadogisuxaba.pdf
    • http://knotware.net/uploads/1/3/0/5/130590432/9612695.pdf
    • http://minnieripertonfund.org/uploads/1/3/0/4/130483322/jenunabigovoberajote.pdf
    • http://akcab.com/uploads/1/3/0/2/130289800/7248501.pdf
    • http://dobryakkot.site/uploads/1/3/0/5/130589310/7abc5dd.pdf
    • http://daytonconcretecontractors.com/uploads/1/3/0/5/130545573/mekulav-gavadugeba-kumemovu.pdf
    • http://gomriz.com/uploads/1/3/0/5/130543980/130543980.html#light+absorption+coefficient+formula

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d3.bin
6929fa0a96f0a5435f5739067a7ab13309daca08b5afc0f65c59368e7c780023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3 7680 bytes
font_01_sfnt_off000057f2.bin
0019ef99eab310d45993eb8f89ed350c4f4d15812d7a405d66ea383e75a479e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F2 3024 bytes

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